Double-circulation triple-effect deodorizer

Abstract

The invention discloses a double-circulation triple-effect deodorizer in the technical field of waste gas treatment, which comprises a shell internally provided with a cavity, and the shell is internally provided with a double-circulation airflow regulation and control module, a triple-effect grading deodorization module, an intelligent control module and a partition plate assembly; the double-circulation air flow regulation and control module is used for realizing intelligent switching and collaborative operation between an external circulation mode and an internal circulation mode by regulating and controlling an air flow path and a distribution proportion; the triple-effect grading deodorization module is used for realizing grading purification of malodorous gas; the fan is used for providing power for gas flowing so as to suck malodorous gas in the station building into the deodorization treatment cavity; the flow regulating valve is used for accurately regulating and controlling the flow ratio of discharged gas to backflow gas; the airflow distributor is used for guiding backflow gas to be uniformly mixed with fresh odor; and the intelligent control module is used for automatically switching an operation mode between an external circulation mode and an internal circulation mode according to the deodorized gas concentration. According to the invention, efficient purification, up-to-standard emission and flexible regulation and control of malodorous gas are realized.

Description

Technical Field

[0001] This invention relates to the field of air purification and waste gas treatment technology, and in particular to a dual-circulation triple-effect deodorizer. Background Technology

[0002] Odor pollution is widespread in places such as garbage transfer stations, sewage treatment plants, and farms. Its composition is complex (containing hydrogen sulfide, ammonia, VOCs, etc.), posing a great threat to human health and the surrounding environment. Existing deodorization equipment mostly uses single deodorization technologies or simple combinations of processes, which have many shortcomings: First, the airflow organization is unreasonable, mostly single-pass treatment, resulting in insufficient contact between odorous gases and deodorization media and poor treatment uniformity; Second, traditional adsorption-based deodorization technologies (such as simple activated carbon adsorption) are prone to saturation, and after saturation, they are prone to secondary pollution, requiring frequent replacement of filter media, resulting in high maintenance costs; Third, discharge-based deodorization technologies mostly use corona discharge, which poses safety hazards such as electrode corrosion and spark discharge, and the uneven distribution of plasma affects the removal rate; Fourth, there is a lack of flexible recycling mechanisms. When the odor concentration fluctuates or the treated gas does not meet the standards, it is directly discharged, causing pollution, or simply shutting down and re-treating leads to the accumulation of odor in the station.

[0003] Although some devices have attempted to introduce a recirculation mode, they have not achieved synergistic optimization with multi-stage deodorization processes. Furthermore, the fixed recirculation ratio and delayed mode switching prevent dynamic adjustment based on gas concentration, resulting in unstable deodorization efficiency and excessive energy consumption. Therefore, developing a deodorization device that combines precise recirculation control, efficient staged deodorization, and safe and stable operation has become an urgent need to solve complex odor pollution problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dual-circulation, triple-effect deodorizer that achieves efficient purification, compliant emission, and flexible control of odorous gases.

[0005] The objective of this invention is achieved as follows: A dual-circulation, triple-effect deodorizer includes a housing with an internal cavity. Within the housing are a dual-circulation airflow control module, a triple-effect staged deodorization module, an intelligent control module, and a partition assembly. The partition assembly divides the cavity into a deodorization treatment chamber and an airflow mixing chamber. An odor inlet, an exhaust outlet, and a return outlet are located on the outer side of the housing. The dual-circulation airflow control module, including a fan, a flow regulating valve, and an airflow distributor, enables intelligent switching and coordinated operation between external and internal circulation modes by regulating the gas flow path and distribution ratio. The triple-effect staged deodorization module achieves staged purification of odorous gases and includes components arranged sequentially along the airflow path of the deodorization treatment chamber. The system comprises a dual-media super-energy ion unit, a dry chemical filtration unit, and an ion fresh air generation unit. A fan is located in the airflow path between the dry chemical filtration unit and the ion fresh air generation unit, providing the power for gas flow to draw odorous gases from the station into the deodorization chamber. The flow control valve includes an exhaust valve at the exhaust port and a return valve at the return port, used to precisely control the flow ratio of exhaust and return gases. An airflow distributor is located at the connection between the deodorization chamber and the airflow mixing chamber, guiding the return gas to mix evenly with the fresh odorous gas. An intelligent control module automatically switches the operating mode between external and internal circulation modes based on the gas concentration after deodorization.

[0006] When this dual-circulation triple-effect deodorizer is working, malodorous gas enters the deodorization chamber through the air inlet. Driven by the fan, the airflow passes through the dual-media super-energy ion unit and the dry chemical filtration unit in sequence for decomposition and adsorption, and is then purified in stages. Finally, it is treated by the ion fresh air generation unit. Its core lies in the intelligent control module, which automatically switches between the "external circulation direct discharge" and "internal circulation recirculation mixing and reprocessing" modes by adjusting the ratio of the exhaust valve and the return valve according to the concentration of the purified gas. The airflow distributor ensures that the return gas and the fresh air are mixed evenly.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the cavity is clearly divided into a deodorization treatment cavity and an airflow mixing cavity by the partition assembly, realizing the physical division and functional zoning of the airflow path, making the purification, mixing and control processes orderly and the structure compact; the three-effect graded deodorization module is used to remove malodorous substances of different properties and molecular sizes step by step with the most suitable technology, realizing broad-spectrum and deep purification, avoiding the shortcomings or blind spots of single technology; the circulation mode is automatically switched according to the gas concentration after treatment, so that the system always operates under the optimal conditions.

[0008] As a further improvement of the present invention, when the exhaust regulating valve is opened to 40%, the return regulating valve is opened to 60%, and the airflow distributor is closed, the equipment is in external circulation operation mode, with part of the purified gas being discharged and part being returned to the station building; when the exhaust regulating valve is closed, the return regulating valve is closed, and the airflow distributor is open, the equipment is in internal circulation operation mode, with all of the purified gas being returned to the inlet of the deodorization treatment chamber for reprocessing.

[0009] As a further improvement of the present invention, the fan is a variable frequency centrifugal fan with a speed range of 1000-3500 r / min. In the internal circulation mode, the fan speed is increased by 30%-50% compared with the external circulation mode to ensure that the odor extraction speed is ≥1.2 m / s. The external discharge regulating valve and the return regulating valve are both electric proportional regulating valves with an adjustment accuracy of ±2%.

[0010] As a further improvement of the present invention, the dual-dielectric super-energy ion unit adopts DDBD low-temperature plasma exhaust gas treatment technology, including a dual-dielectric barrier discharge super-energy ion lamp. The electrodes of the super-energy ion lamp are encapsulated and built into a dielectric material composed of alumina ceramic. The super-energy ion lamp forms a uniformly distributed high-density low-temperature plasma region between the two dielectric stages, and the discharge area coverage of this plasma region is ≥95%. The wavelength of the super-energy ion lamp is 185-254nm, and the generated plasma density is ≥1×10⁻⁶. 12 The number of odorous gases per cm³ is 0.5-2 seconds.

[0011] As a further improvement of the present invention, the dry chemical filtration unit includes several porous carriers arranged in a matrix and chemical filter media loaded thereon; the porous carriers are made of modified diatomaceous earth or activated carbon fiber, with a specific surface area ≥800m² / g and a porosity ≥70%; the chemical agents are selected according to the chemical properties of the target odorous substances, including alkaline oxides or acidic oxides, wherein the alkaline oxides are calcium hydroxide or sodium carbonate, used to neutralize and degrade acidic odorous substances, and the acidic oxides are ammonium dihydrogen phosphate or ammonium sulfate, used to neutralize and degrade alkaline odorous substances.

[0012] As a further improvement of the present invention, the ion fresh air generating unit includes an oxygen ion generating device. This oxygen ion generating device employs low-temperature plasma excitation technology to activate the clean air filtered through the first two stages of treatment, generating a new cluster of positive and negative oxygen ions. The concentration of the oxygen ion cluster is ≥1×10⁻⁶. 6 pcs / cm³

[0013] As a further improvement of the present invention, the intelligent control module includes an odor concentration sensor, a fan frequency converter, and a mode switching controller; the odor concentration sensor has two sets, the first set is set at the outlet of the deodorization treatment chamber, and the second set is set inside the station building, with a measurement range of 0-1000ppm and an accuracy of ±5ppm, used for real-time detection of gas purification effect and environmental concentration data; the preset concentration threshold of the mode switching controller can be adjusted through a remote terminal or local control panel, with a threshold range of 10-50ppm; the mode switching controller is connected to the odor concentration sensor, the fan frequency converter, and... The actuators and signal connections of the three-effect staged deodorization module in the dual-circulation airflow control system are configured to execute the following control logic: continuously receive concentration signals from sensors and compare them with preset thresholds; when the gas concentration at the outlet of the deodorization treatment chamber is higher than the set threshold, the controller outputs a control command within 1 second, first switching to internal circulation mode, and simultaneously increasing the fan speed by 30%-50% through the fan frequency converter; when the gas concentration drops to or below the set threshold, the controller outputs a command to switch back to external circulation mode, and can dynamically adjust the fan speed according to the concentration data in the station to achieve energy-saving operation.

[0014] As a further improvement of the present invention, the intelligent control module also includes a communication module and a storage module. The communication module is used to establish a data connection with the remote monitoring terminal to realize remote status monitoring and parameter setting. The storage module is used to continuously record the operating parameters, concentration data and fault information of the equipment for a storage time of not less than one year.

[0015] As a further improvement of the present invention, a fault alarm module is also included, which is linked to the intelligent control module. The fault alarm module includes an audible and visual alarm. The intelligent control module continuously monitors the operating status signals of each key component. When any of the following preset abnormal conditions are detected, such as the deactivation of the dual-medium super-energy ion unit, the resistance of the dry chemical filter unit exceeding 800Pa, the oxygen ion concentration of the ion fresh air generation unit being lower than the standard, the fan speed deviating from the set value by ±10%, or the sensor signal being interrupted, the module immediately sends a command to the fault alarm module to drive the module to activate the audible and visual alarm function with a sound intensity of not less than 85dB and a light flashing frequency of 2 times / second, and simultaneously records the corresponding fault type and occurrence time.

[0016] As a further improvement of the present invention, the partition assembly includes a main partition, a first longitudinal partition, a second longitudinal partition, a first transverse partition, a second transverse partition, a third transverse partition, and a fourth transverse partition. The main partition is arranged parallel to the length direction of the shell, dividing the inner cavity of the shell into a left cavity and a right cavity. The dual-medium super-energy ion unit and the dry chemical filtration unit are arranged sequentially in the middle of the left cavity along the airflow direction. The fan is located at the rear of the left cavity, and its air inlet faces the dry chemical filtration unit. An airflow channel is left between its air outlet and the inner wall of the shell. The front side of the main partition is connected to the inner wall of the shell, and the rear side is connected to the outer shell of the fan. The first transverse partition, the first longitudinal partition, and the second transverse partition are connected sequentially to form two right-angle structures, which together divide the front part of the left cavity into a pure odor chamber and an airflow mixing chamber. The first longitudinal partition is provided with a primary air filter to achieve communication between the two chambers. A gap is left between the first transverse partition and the dual-medium super-energy ion unit, and a gap is left between the second transverse partition and the inner wall of the shell; the odor inlet is located on the upper part of the shell and is connected to the pure odor chamber; the ion fresh air generating unit is located in the middle of the right cavity; the third transverse partition, the second longitudinal partition, and the fourth transverse partition are connected in sequence to form two right-angle structures, which together divide the front part of the right cavity into a clean air chamber 1 and a clean air chamber 2. A medium-efficiency air filter is provided on the second longitudinal partition to achieve communication between the two chambers. A gap is left between the third transverse partition and the inner wall of the shell, and a gap is left between the fourth transverse partition and the ion fresh air generating unit; the exhaust port is arranged diagonally opposite to the odor inlet; the return port is located on the upper part of the shell and is connected to the clean air chamber 2; the airflow distributor is located on the main partition and is used to control the connection between the airflow mixing chamber and the clean air chamber 1. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention.

[0019] Figure 2 This is a front view of a preferred embodiment of the present invention.

[0020] Figure 3 This is a side view of a preferred embodiment of the present invention.

[0021] Figure 4 This is a top view of a preferred embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram illustrating the working principle of a preferred embodiment of the present invention.

[0023] The components include: 1. Housing; 2. Odor inlet; 3. Exhaust outlet; 4. Return outlet; 5. Fan; 6. Airflow distributor; 7. Dual-media super-energy ion unit; 8. Dry chemical filtration unit; 9. Ion fresh air generation unit; 10. External exhaust regulating valve; 11. Return regulating valve; 12. Main partition; 13. Longitudinal partition one; 14. Longitudinal partition two; 15. Transverse partition one; 16. Transverse partition two; 17. Transverse partition three; 18. Transverse partition four; and 19. Intelligent control module. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This embodiment is applied to a waste transfer station building.

[0026] A municipal waste transfer station, with a sealed building area of ​​800㎡, has an average odor concentration (mainly hydrogen sulfide and ammonia) of 400-600ppm. The present invention's dual-circulation triple-effect deodorizer (model HT-SG-100) was selected for treatment. The following describes its application in conjunction with... Figure 1-5 The structure and working process of this dual-circulation triple-effect deodorizer are described in detail.

[0027] The dual-circulation triple-effect deodorizer includes a housing 1 with dimensions of 2400mm × 1300mm × 988mm (length × width × height); the outer side of the housing 1 is equipped with an openable and closable sealed maintenance door (not shown in the figure); the housing 1 contains a dual-circulation airflow control module, a triple-effect staged deodorization module, an intelligent control module 19, and a partition assembly; the partition assembly divides the cavity into a deodorization treatment chamber and an airflow mixing chamber; the outer side of the housing 1 is equipped with an odor inlet 2, an exhaust outlet 3, and a return outlet 4; the dual-circulation airflow control module is used to achieve intelligent switching and coordinated operation between the external circulation mode and the internal circulation mode by adjusting the gas flow path and distribution ratio, including a fan 5, a flow regulating valve, and an airflow distributor 6; the triple-effect staged deodorization module is used to achieve staged purification of odorous gases, including along the deodorization process... The airflow path of the deodorization chamber is sequentially arranged with a dual-media super-energy ion unit 7, a dry chemical filtration unit 8, and an ion fresh air generation unit 9; a fan 5 is located on the airflow path between the dry chemical filtration unit 8 and the ion fresh air generation unit 9, used to provide the power for gas flow to draw malodorous gas in the station into the deodorization treatment chamber; the flow regulating valve includes an external discharge regulating valve 10 set at the exhaust port 3 and a return regulating valve 11 set at the return port 4, used to precisely control the flow ratio of the external discharge and return gas; the airflow distributor 6 is set at the connection between the deodorization treatment chamber and the airflow mixing chamber, used to guide the return gas and fresh malodorous gas to mix evenly; the intelligent control module 19 is used to automatically / manually switch the operating mode between external circulation mode and internal circulation mode according to the gas concentration after deodorization.

[0028] When the exhaust regulating valve 10 is opened to 40%, the return regulating valve 11 is opened to 60%, and the airflow distributor 6 is closed, the equipment is in external circulation mode, with part of the purified gas being discharged and part being returned to the station building; when the exhaust regulating valve 10 is closed, the return regulating valve 11 is closed, and the airflow distributor 6 is open, the equipment is in internal circulation mode, with all of the purified gas being returned to the inlet of the deodorization treatment chamber for reprocessing.

[0029] The blower 5 is a 5.5kW variable frequency centrifugal blower with a speed range of 1000-3500r / min. During operation, the intelligent control module 19 automatically adjusts the speed of the blower 5 according to the mode switching: in the internal circulation mode, the speed of the blower 5 is increased by 30%-50% compared with the external circulation mode, ensuring that the suction speed of the odor in the station is not less than 1.2m / s, thereby enhancing the airflow disturbance and treatment intensity. The exhaust regulating valve 10 and the return regulating valve 11 are both electric proportional regulating valves with an adjustment accuracy of ±2%. The two work together to perform high-precision and continuous dynamic control of the gas exhaust and return ratio based on the real-time monitoring concentration. Together, they realize precise and adaptive control of the gas flow path and treatment intensity, thereby ensuring stable high removal efficiency and achieving significant energy saving and consumption reduction when the odor concentration fluctuates.

[0030] The dual-dielectric super-ion unit 7 employs DDBD low-temperature plasma waste gas treatment technology. Its core comprises two side-by-side super-ion lamps, whose electrodes are encapsulated and embedded within a dielectric material composed of alumina ceramic. The super-ion lamps create a uniformly distributed, high-density low-temperature plasma region between the two dielectric layers, with a discharge area coverage ≥95%. The super-ion lamps operate at wavelengths of 185-254 nm and can generate a plasma density as high as 1.2 × 10⁻⁶. 12 The concentration of odorous gases per cm³ is designed to allow for a residence time of 0.5-2 seconds within the plasma region as the gas flows through the unit. The enclosed electrodes and alumina ceramic dielectric effectively prevent electrode corrosion and spark discharge risks, achieving intrinsic safety. The high coverage, high density, and uniform plasma region, combined with optimized contact time, ensures sufficient contact and efficient decomposition of odorous components (especially VOCs and hydrogen sulfide) with high-energy active particles, resulting in high and stable treatment efficiency that adapts to fluctuations in inlet concentration.

[0031] The dry chemical filtration unit 8 comprises six porous carriers arranged in a matrix and chemical filter media loaded on them. The porous carriers are made of modified diatomaceous earth with a specific surface area ≥800m² / g and a porosity ≥70%. A composite chemical filter media composed of calcium hydroxide and sodium carbonate as the main active components is filled in the modified diatomaceous earth carriers, with a total filling amount of 60kg. The matrix arrangement ensures the uniformity of airflow distribution, allowing malodorous gases to fully contact the filter media. The modified diatomaceous earth carriers with high specific surface area and high porosity provide a large reaction interface and unobstructed microporous channels, effectively loading and fixing the chemical filter media. The carefully selected composite chemical filter media can specifically and efficiently neutralize and remove acidic and alkaline malodorous components such as hydrogen sulfide and ammonia. This structure ensures high removal efficiency while having low and stable resistance, making full use of the filter media and effectively extending the maintenance cycle.

[0032] The ion fresh air generating unit 9 includes an oxygen ion generator, which uses low-temperature plasma excitation technology to activate the clean air after the first two stages of treatment and filtration, generating ions at a concentration of 1.5 × 10⁻⁶. 6 The new ecological positive and negative oxygen ion clusters per cm³ generate oxygen ion clusters that are directly transported into the station building. These ion clusters not only deeply oxidize and decompose any trace odors that may remain in the space, but also have significant antibacterial and air-freshening effects.

[0033] The intelligent control module 19 includes an odor concentration sensor, a frequency converter for fan 5, and a mode switching controller. Two sets of odor concentration sensors are provided: the first set is located at the outlet of the deodorization treatment chamber, and the second set is located inside the station building. Their measurement range is 0-1000 ppm, with an accuracy of ±5 ppm, used for real-time detection of gas purification effect and environmental concentration data. The preset concentration threshold of the mode switching controller can be adjusted via a remote terminal or local control panel, with a threshold range of 30 ppm. The mode switching controller is connected to the odor concentration sensor, the frequency converter for fan 5, the actuators in the dual-circulation airflow control system, and the three-effect staged deodorization module, and is configured to execute the following control logic: continuously receive concentration signals from the sensors and compare them with the preset threshold; when the odor treatment chamber exits... When the gas concentration at the inlet exceeds the set threshold, the controller outputs a control command within one second, first switching to internal circulation mode and simultaneously increasing the speed of fan 5 by 30%-50% via the frequency converter. When the gas concentration drops to or below the set threshold, the controller outputs a command to switch back to external circulation mode and can dynamically adjust the speed of fan 5 based on the concentration data in the station to achieve energy-saving operation. The dual-sensor arrangement enables dual, accurate, and real-time monitoring of both the treatment effect and the station environment. The fast closed-loop control logic based on threshold comparison ensures that the equipment can respond to concentration fluctuations within one second, intelligently and automatically switching seamlessly between the two circulation modes and adjusting fan 5 in conjunction. This significantly improves the system's adaptability to load changes and operational economy while ensuring that the deodorization efficiency always meets the standard.

[0034] The intelligent control module 19 also includes a communication module and a storage module. The communication module is used to establish a data connection with the remote monitoring terminal to realize remote status monitoring and parameter setting. The storage module is used to continuously record the equipment's operating parameters, concentration data and fault information, with a storage time of not less than one year.

[0035] To enhance the overall system's operational safety, the deodorizer also includes a fault alarm module linked to the intelligent control module 19. The fault alarm module includes an audible and visual alarm. The intelligent control module 19 continuously monitors the operational status signals of each key component. When it detects any of the following preset abnormal conditions: deactivation of the dual-media super-energy ion unit 7, resistance of the dry chemical filter unit 8 exceeding 800Pa, oxygen ion concentration of the ion fresh air generation unit 9 below the standard, fan speed deviating from the set value by ±10%, or sensor signal interruption, it immediately sends a command to the fault alarm module to activate the audible and visual alarm function with a sound intensity of not less than 85dB and a light flashing frequency of 2 times / second, and simultaneously records the corresponding fault type and occurrence time.

[0036] The partition assembly includes a main partition 12, a first longitudinal partition 13, a second longitudinal partition 14, a first transverse partition 15, a second transverse partition 16, a third transverse partition 17, and a fourth transverse partition 18. The main partition 12 is arranged parallel to the length direction of the housing 1, dividing the inner cavity of the housing 1 into a left cavity and a right cavity. The dual-medium super-energy ion unit 7 and the dry chemical filter unit 8 are arranged sequentially in the middle of the left cavity along the airflow direction. The fan 5 is located at the rear of the left cavity, and its air inlet faces the dry chemical filter unit 8. An airflow channel is left between its air outlet and the inner wall of the housing 1. The front side of the main partition 12 is connected to the inner wall of the housing 1, and the rear side is connected to the outer shell of the fan 5. The first transverse partition 15, the first longitudinal partition 13, and the second transverse partition 16 are connected sequentially to form two right-angle structures, which together divide the front part of the left cavity into a pure odor chamber and an airflow mixing chamber. The first longitudinal partition 13 is equipped with a primary air filter to achieve communication between the two chambers. A gap is left between the first transverse partition 15 and the dual-medium super-energy ion unit 7, and a gap is left between the second transverse partition 16 and the inner wall of the shell 1; the odor inlet 2 is located on the upper part of the shell 1 and is connected to the pure odor chamber; the ion fresh air generating unit 9 is located in the middle of the right cavity; the third transverse partition 17, the second longitudinal partition 14, and the fourth transverse partition 18 are connected in sequence to form two right-angle structures, which together divide the front part of the right cavity into the first clean air chamber and the second clean air chamber. Among them, the second longitudinal partition 14 is equipped with a medium-efficiency air filter to realize the connection between the two chambers, the third transverse partition 17 is left with a gap between the inner wall of the shell 1, and the fourth transverse partition 18 is left with a gap between the ion fresh air generating unit 9; the exhaust port 3 is arranged diagonally opposite to the odor inlet 2; the return port 4 is located on the upper part of the shell 1 and is connected to the second clean air chamber; the airflow distributor 6 is located on the main partition 12 and is used to control the connection and disconnection between the airflow mixing chamber and the first clean air chamber.

[0037] The main partition 12 physically separates the treatment area from the fresh air purification area, effectively preventing airflow short-circuiting and cross-contamination. Multiple functional chambers, precisely divided by the longitudinal and transverse partitions, work in conjunction with each treatment unit, fan 5, and inlet / outlet to enforce an optimized gas flow path: "inlet → mixing / pretreatment → ion decomposition → chemical filtration → fan 5 drive → diversion (exhaust / return / fresh air)," ensuring sufficient and uniform contact between odorous gases and the treatment media at each stage. The specific diagonal inlet / outlet arrangement facilitates smooth overall airflow organization and reduces pressure loss. This layout highly integrates the dual-circulation airflow channels, three-stage treatment modules, and power unit within a compact space, achieving a balance between maximizing treatment efficiency and miniaturizing the equipment, providing a precise physical basis for intelligent circulation control.

[0038] Operation process:

[0039] At initial startup, the concentration inside the station is 600 ppm, and the concentration after treatment is 45 ppm, which exceeds the threshold of 30 ppm. The intelligent control module 19 automatically switches to the internal circulation mode. At this time, the external discharge regulating valve 10 is closed, the speed of the fan 5 is increased from 2000 r / min to 3000 r / min, and the gas is fully returned to the airflow mixing chamber for reprocessing.

[0040] After running for 30 minutes, the treated concentration dropped to 25 ppm, which is below the threshold. The equipment automatically switched to external circulation mode, and the opening of the external discharge regulating valve 10 was adjusted to 40%, and the opening of the return regulating valve 11 was adjusted to 60%, so that 40% of the purified gas (concentration 25 ppm) was discharged and 60% was returned to the station building.

[0041] During operation, the concentration inside the station was stable at 20-30 ppm. The dual-medium super-energy ion unit 7 operated stably without electrode corrosion, the resistance of the dry chemical filter unit 8 was maintained at 400-500 Pa, and the ion fresh air generation unit 9 continuously delivered oxygen ions, resulting in a significant improvement in the air quality inside the station.

[0042] Operational Results: Test results after 24 hours of continuous operation showed that the total removal rate of odorous substances reached 98.5%, with hydrogen sulfide removal rate at 99.2% and ammonia removal rate at 98.3%. The average daily energy consumption in the external circulation mode was 125 kWh, which is 35% lower than that of traditional single-circulation deodorizers. The equipment operating noise was 63 dB(A), which meets the noise standards for the station. The dry chemical filter unit 8 needs to be replaced after 6 months of use, and the replacement process only takes 20 minutes, making maintenance convenient and efficient.

[0043] The advantages of this invention are as follows: the three-effect graded deodorization modules work synergistically, DDBD technology achieves uniform discharge decomposition, dry chemical filtration achieves chemical reaction degradation, and ionized fresh air enhances the removal of residual pollutants, achieving a total removal rate of ≥98% for odorous substances such as hydrogen sulfide, ammonia, and VOCs; the dual-circulation mode dynamically switches to ensure that the treated gas always meets emission standards, avoiding the discharge of non-compliant gas and pollution; the dual-medium super-energy ion unit adopts a built-in electrode design, which is corrosion-free and spark-free, solving the safety hazards of traditional discharge technology; dry chemical filtration achieves reaction degradation rather than simple adsorption, avoiding secondary pollution after saturation and extending the service life of the filter media; in the external circulation mode, 60% of the gas is recirculated, reducing the amount of fresh air processed and lowering energy consumption; in the internal circulation mode, the fan intelligently speeds up to ensure the suction effect, adapting to high-concentration and fluctuating odor pollution scenarios, and covering various station-type odor pollution sources; all three-effect deodorization modules are detachable, facilitating quick replacement of filter media and maintenance; the intelligent control module supports remote monitoring and parameter adjustment, reducing on-site maintenance workload.

[0044] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A dual-circulation triple-effect deodorizer, comprising a shell with an internal cavity, characterized in that, The housing contains a dual-circulation airflow control module, a three-effect staged deodorization module, an intelligent control module, and a partition assembly. The partition assembly divides the cavity into a deodorization treatment chamber and an airflow mixing chamber. The outer side of the housing has an odor inlet, an exhaust outlet, and a return outlet. The dual-circulation airflow control module, including a fan, flow regulating valve, and airflow distributor, enables intelligent switching and coordinated operation between external and internal circulation modes by adjusting the gas flow path and distribution ratio. The three-effect staged deodorization module achieves staged purification of odorous gases, including airflow along the deodorization treatment chamber. The system comprises a dual-media super-energy ion unit, a dry chemical filtration unit, and an ion fresh air generation unit arranged sequentially. A fan is located in the airflow path between the dry chemical filtration unit and the ion fresh air generation unit, providing the power for gas flow to draw odorous gases from the station into the deodorization chamber. The flow control valve includes an exhaust control valve at the exhaust port and a return control valve at the return port, used to precisely regulate the flow ratio of exhaust and return gases. An airflow distributor is located at the connection between the deodorization chamber and the airflow mixing chamber, guiding the return gas to mix evenly with the fresh odorous gases. The intelligent control module is used to automatically switch the operating mode between external circulation mode and internal circulation mode based on the gas concentration after deodorization.

2. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, When the exhaust regulating valve is opened to 40%, the return regulating valve is opened to 60%, and the airflow distributor is closed, the equipment is in external circulation mode, with part of the purified gas being discharged and part being returned to the station building; when the exhaust regulating valve is closed, the return regulating valve is closed, and the airflow distributor is open, the equipment is in internal circulation mode, with all of the purified gas being returned to the inlet of the deodorization treatment chamber for reprocessing.

3. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The fan is a variable frequency centrifugal fan with a speed range of 1000-3500 r / min. In the internal circulation mode, the fan speed is increased by 30%-50% compared with the external circulation mode to ensure that the odor extraction speed is ≥1.2 m / s. The external discharge regulating valve and the return regulating valve are both electric proportional regulating valves with an adjustment accuracy of ±2%.

4. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The dual-dielectric super-ion unit employs DDBD low-temperature plasma exhaust gas treatment technology, including a dual-dielectric barrier discharge super-ion lamp. The electrodes of the super-ion lamp are encapsulated and embedded within a dielectric material composed of alumina ceramic. The super-ion lamp forms a uniformly distributed high-density low-temperature plasma region between the two dielectric stages, with a discharge area coverage ≥95%. The wavelength of the super-ion lamp is 185-254nm, and the generated plasma density is ≥1×10⁻⁶. 12 The number of odorous gases per cm³ is 0.5-2 seconds.

5. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The dry chemical filtration unit includes several porous carriers arranged in a matrix and chemical filter media loaded thereon; the porous carriers are made of modified diatomaceous earth or activated carbon fiber, with a specific surface area ≥800m² / g and a porosity ≥70%; the chemical agents are selected according to the chemical properties of the target odor substances, including alkaline oxides or acidic oxides, wherein the alkaline oxides are calcium hydroxide or sodium carbonate, used to neutralize and degrade acidic odor substances, and the acidic oxides are ammonium dihydrogen phosphate or ammonium sulfate, used to neutralize and degrade alkaline odor substances.

6. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The ion fresh air generation unit includes an oxygen ion generator, which uses low-temperature plasma excitation technology to activate the clean air after the first two stages of filtration, generating a new cluster of positive and negative oxygen ions with a concentration ≥1×10⁻⁶. 6 pcs / cm³ 7. The dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The intelligent control module includes an odor concentration sensor, a fan frequency converter, and a mode switching controller. The odor concentration sensor has two sets: the first set is located at the outlet of the deodorization treatment chamber, and the second set is located inside the station building. Its measurement range is 0-1000 ppm, with an accuracy of ±5 ppm, used for real-time monitoring of gas purification effect and environmental concentration data. The preset concentration threshold of the mode switching controller can be adjusted via a remote terminal or local control panel, with a threshold range of 10-50 ppm. The mode switching controller is connected to the odor concentration sensor, the fan frequency converter, and the dual-circulation airflow regulator. The actuators and signal connections of the three-effect staged deodorization module in the control system are configured to execute the following control logic: continuously receive concentration signals from sensors and compare them with preset thresholds; when the gas concentration at the outlet of the deodorization treatment chamber is higher than the set threshold, the controller outputs a control command within 1 second, first switching to internal circulation mode, and simultaneously increasing the fan speed by 30%-50% through the fan frequency converter; when the gas concentration drops to or below the set threshold, the controller outputs a command to switch back to external circulation mode, and can dynamically adjust the fan speed according to the concentration data in the station to achieve energy-saving operation.

8. A dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The intelligent control module also includes a communication module and a storage module. The communication module is used to establish a data connection with the remote monitoring terminal to realize remote status monitoring and parameter setting. The storage module is used to continuously record the equipment's operating parameters, concentration data and fault information for a period of not less than one year.

9. A dual-circulation triple-effect deodorizer according to claim 1, characterized in that, It also includes a fault alarm module that is linked to the intelligent control module. The fault alarm module includes an audible and visual alarm. The intelligent control module continuously monitors the operating status signals of each key component. When it detects any of the following preset abnormal conditions: deactivation of the dual-medium super-energy ion unit, resistance of the dry chemical filter unit exceeding 800Pa, oxygen ion concentration of the ion fresh air generation unit below the standard, fan speed deviating from the set value by ±10%, or sensor signal interruption, it immediately sends a command to the fault alarm module to drive the module to activate the audible and visual alarm function with a sound intensity of not less than 85dB and a light flashing frequency of 2 times / second, and simultaneously records the corresponding fault type and occurrence time.

10. A dual-circulation triple-effect deodorizer according to claim 1, characterized in that, The partition assembly includes a main partition, longitudinal partition one, longitudinal partition two, transverse partition one, transverse partition two, transverse partition three, and transverse partition four. The main partition is arranged parallel to the length direction of the shell, dividing the inner cavity of the shell into a left cavity and a right cavity. The dual-medium super-energy ion unit and the dry chemical filtration unit are arranged sequentially in the middle of the left cavity along the airflow direction. The fan is located at the rear of the left cavity, and its air inlet faces the dry chemical filtration unit. An airflow channel is left between its air outlet and the inner wall of the shell. The front side of the main partition is connected to the inner wall of the shell, and the rear side is connected to the outer shell of the fan. Transverse partition one, longitudinal partition one, and transverse partition two are connected sequentially to form two right-angle structures, which together divide the front part of the left cavity into a pure odor chamber and an airflow mixing chamber. The longitudinal partition one is equipped with a primary air filter to achieve communication between the two chambers. The transverse partition one... A gap is left between the dual-medium super-energy ion unit and the shell; a gap is left between the second transverse partition and the inner wall of the shell; the odor inlet is located on the upper part of the shell and is connected to the pure odor chamber; the ion fresh air generating unit is located in the middle of the right cavity; the third transverse partition, the second longitudinal partition, and the fourth transverse partition are connected in sequence to form two right-angle structures, which together divide the front part of the right cavity into a clean air chamber and a clean air chamber. The second longitudinal partition is equipped with a medium-efficiency air filter to achieve communication between the two chambers; a gap is left between the third transverse partition and the inner wall of the shell; a gap is left between the fourth transverse partition and the ion fresh air generating unit; the exhaust port is diagonally arranged opposite the odor inlet; the return port is located on the upper part of the shell and is connected to the clean air chamber; the airflow distributor is located on the main partition and is used to control the connection and disconnection between the airflow mixing chamber and the clean air chamber.

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