Method and apparatus for odor treatment based on redox ion exchange fibers

Abstract

This invention relates to an odor treatment method and equipment based on redox ion exchange fibers, belonging to the field of wastewater treatment technology. The odor treatment method based on redox ion exchange fibers includes the following steps: pretreating the odor to remove particulate impurities; passing the pretreated odor through a reaction zone filled with redox ion exchange composite fiber material, catalytically degrading the target pollutants in the odor into harmless products, which are then discharged; when the adsorption capacity of the redox ion exchange composite fiber material reaches a threshold, performing acid-base washing treatment to restore the adsorption and catalytic activity of the redox ion exchange composite fiber material, achieving recycling. This invention achieves integrated adsorption-catalytic degradation, combined with fiber acid-base regeneration technology, breaking through the limitations of traditional single-function technologies and solving the pain points of low purification efficiency, high energy consumption, secondary pollution, and poor adaptability.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an odor treatment method and equipment based on redox ion exchange fibers. Background Technology

[0002] Odor pollution is widespread in municipal engineering, industrial production, agriculture, animal husbandry, and commercial public facilities. The main pollutants include ammonia, hydrogen sulfide, volatile organic compounds, and total volatile organic compounds. It not only affects the living environment but also harms human health. Moreover, it must meet relevant environmental emission standards. Therefore, efficient and environmentally friendly odor control technologies have become an urgent need in the industry.

[0003] Currently, mainstream odor treatment technologies are divided into physical, chemical, and biological methods, all of which have significant limitations. Physical methods (such as activated carbon adsorption and dilution masking) only reduce odor perception through physical interception or concentration dilution, without decomposing pollutants. They suffer from limited adsorption capacity, easy saturation, high operating costs, and potential secondary pollution, making it difficult to achieve near-zero emission requirements. Chemical methods (such as spray absorption and oxidation combustion) require large amounts of chemical reagents, have high energy consumption, and easily generate wastewater containing pollutants or NO. x Secondary pollutants are often treated with biological methods, such as biofilters and bioscrubbers. These methods rely on microbial metabolism to degrade pollutants, but they have drawbacks such as slow degradation rate, large footprint, significant influence from environmental conditions such as temperature and humidity, long start-up period, and poor treatment effect on recalcitrant pollutants.

[0004] In summary, existing technologies generally suffer from problems such as low purification efficiency, high energy consumption, easy generation of secondary pollution, and poor adaptability. They cannot simultaneously meet the treatment needs of high efficiency degradation, low energy consumption and environmental protection, and stable and reliable operation under complex working conditions. There is an urgent need to develop an odor treatment technology and equipment that has multiple advantages. Summary of the Invention

[0005] The purpose of this invention is to provide an odor treatment method and equipment based on redox ion exchange fibers. It aims to prepare redox ion exchange composite fiber materials with dual functions through chemical grafting modification, realize the integration of adsorption-catalytic degradation, and combine fiber acid-base regeneration technology to break through the limitations of traditional single-function technology and solve the pain points of low purification efficiency, high energy consumption, secondary pollution and poor adaptability.

[0006] On the one hand, the odor treatment method based on redox ion exchange fibers provided by the present invention adopts the following technical solution: Odor treatment method based on redox ion exchange fibers includes the following steps: 1) Odor collection and pretreatment of odor to remove particulate impurities from the odor; 2) The odorous gas pretreated in step 1) is passed into a reaction zone filled with redox ion exchange composite fiber material. Through the free radical chain reaction initiated by the redox active groups, the adsorbed pollutants are catalytically degraded into harmless products and then discharged. 3) When the redox ion exchange composite fiber material in step 2) reaches adsorption saturation, it is regenerated by acid and alkali washing to restore the adsorption and catalytic activity of the fiber material and achieve recycling.

[0007] Preferably, the redox ion exchange composite fiber material is prepared by introducing redox active groups and ion exchange groups on the fiber surface through chemical grafting modification; The redox active group is at least one of a hydroxyl radical precursor group and a superoxide anion precursor group; the ion exchange group is at least one of an amino group, a carboxyl group, and a sulfonic acid group.

[0008] Preferably, in step 2), the empty bed residence time of the odor gas with the redox ion exchange composite fiber material is 0.5-2.0 s; The target pollutants in the odor include at least one of ammonia and hydrogen sulfide.

[0009] Preferably, in step 3), the acid-base washing treatment uses alternating washing with sodium hydroxide solution and hydrochloric acid solution; The adsorption saturation state of the redox ion exchange composite fiber material is determined by the reaction module's operating resistance reaching twice the initial resistance.

[0010] Preferably, the concentrations of the sodium hydroxide solution and the hydrochloric acid solution are both 0.5 mol / L; The acid-base washing treatment takes 1-2 hours.

[0011] On the other hand, the present invention also provides an odor treatment device based on redox ion exchange fibers to implement the above method, which adopts the following technical solution: Odor treatment equipment based on redox ion exchange fibers includes: A housing, wherein the housing is provided with an air inlet and an air outlet; At least one set of reaction modules, the reaction modules being disposed inside the shell, the reaction modules being filled with redox ion exchange composite fiber material to form a reaction zone.

[0012] Preferably, the processing air volume is <1000m³. 3 At / h, the number of reaction modules is one set; Air volume handled: 1000-5000m³ 3 At / h, the number of reaction modules is two to four groups; Air volume handling capacity: 5000-20000m³ 3 At a rate of / h, the number of reaction modules is four to eight groups; Air volume > 20000m³ 3 When / h, the number of reaction modules is greater than eight groups.

[0013] Preferably, the reaction module is provided with three layers of redox ion exchange composite fiber material arranged along the direction of odor flow, and the filling density ratio of the three layers of redox ion exchange composite fiber material arranged along the direction of odor flow is 1.5:1.2:1.0; The redox ion exchange composite fiber material has a fiber diameter of 15-30 μm and a specific surface area of ​​0.8-1.5 m². 2 / g.

[0014] Preferably, it also includes a preprocessing unit; The pretreatment unit is located between the air inlet and the reaction module, and the pretreatment unit includes a centrifugal separator and an electrostatic precipitator.

[0015] Preferably, it also includes a circulation system, which includes an inlet pipe, an outlet pipe, and a circulation pump; The feed pipe is used to provide acid or alkali solution for regeneration to the redox ion exchange composite fiber material in the reaction zone, and the discharge pipe is used to collect the acid or alkali solution in the reaction zone.

[0016] In summary, the present invention has the following beneficial technical effects: 1. This invention utilizes redox ion exchange composite fiber materials, employing an integrated adsorption-catalytic degradation mechanism to efficiently adsorb and deeply decompose malodorous gas molecules into harmless substances such as CO2 and H2O, fundamentally eliminating secondary pollution. The removal rate for pollutants such as hydrogen sulfide and ammonia exceeds 99%. This process requires no chemical additives, and the ion exchange rate is two orders of magnitude faster than traditional resins, resulting in energy consumption reduction of over 30% compared to traditional technologies. The daily energy consumption for processing 10,000 cubic meters of air is only approximately 5 kWh, achieving energy savings of over 95% and unifying ultra-low emissions with green operation.

[0017] 2. The equipment in this invention achieves a pollutant removal rate of over 99%, solving the problem of insufficient purification efficiency in traditional technologies; it requires no chemical additives, produces no secondary pollution, and aligns with the needs of green and low-carbon development; the redox ion exchange composite fiber material can be recycled through acid and alkali treatment, and with modular design and intelligent control, it is suitable for various scenarios such as municipal, industrial, and agricultural applications, as well as different concentrations of odor, making maintenance simple and operating costs low; the equipment is compact, lightweight, and flexible in installation, further enhancing its convenience and practicality in actual applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the odor treatment device based on redox ion exchange fiber according to the present invention; Figure 2 This is a schematic cross-sectional view of the shell structure; Figure 3 A graph showing the effect of NH3 treatment; Figure 4 The graph shows the effect of H2S processing.

[0019] Explanation of reference numerals in the attached drawings: 1. Pretreatment unit; 11. Centrifuge; 12. Electrostatic precipitator; 2. Shell; 21. Air inlet; 22. Air outlet; 23. Reaction module; 231. Oxidation-reduction ion exchange composite fiber material; 24. Reaction zone; 3. Circulation system; 31. Feed pipe; 32. Discharge pipe; 33. Circulation pump. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings. Figure 1-2 The technical solutions of the present invention have been clearly and completely described. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0021] Example Example 1 Reference Figure 1 and Figure 2 An odor treatment device based on redox ion exchange fibers includes a pretreatment unit 1, a housing 2, and a circulation system 3 arranged sequentially along the odor flow direction. The pretreatment unit 1 is used to pretreat the odor. The housing 2 is provided with at least one set of reaction modules 23. The reaction modules 23 are filled with redox ion exchange composite fiber material 231 to form a reaction zone 24 for adsorption-catalytic degradation reaction with the odor. The circulation system 3 is used to provide acid or alkali solution for regeneration to the redox ion exchange composite fiber material 231.

[0022] Reference Figure 1The housing 2 is provided with an air inlet 21 and an air outlet 22. The air inlet 21 is connected to the pretreatment unit 1, which is used to pretreat the odor to remove particulate impurities from the odor and protect the subsequent reaction module 23. The treated gas is discharged to the external environment through the air outlet 22. In this embodiment, the pretreatment unit 1 includes a centrifugal separator 11 and an electrostatic precipitator 12, which are connected in series. The odor first enters the centrifugal separator 11, where centrifugal force is used to separate larger particles. Then it enters the electrostatic precipitator 12, where high-voltage electrostatic adsorption is used to remove fine dust. After pretreatment, the concentration of particulate matter in the odor is reduced to below 1 mg / m3.

[0023] Reference Figure 1 and Figure 2 The reaction module 23 adopts a modular design, internally containing three layers of redox ion exchange composite fiber material 231, arranged sequentially along the odor flow direction as the first layer (windward side), the second layer (transition layer), and the third layer (clean layer). The filling density of each layer of redox ion exchange composite fiber material 231 decreases in a gradient, with the first layer having the highest density, followed by the second layer, and the third layer having the lowest density, with a preferred density ratio of 1.5:1.2:1.0. This gradient filling structure allows pollutants to be distributed layer by layer, preventing the surface layer from becoming saturated too quickly and extending the single-use cycle. The total thickness of the redox ion exchange composite fiber material 231 is 50-150 mm, which can be adjusted according to the treated air volume and pollutant concentration.

[0024] Reference Figure 1 and Figure 3 The circulation system 3 includes an inlet pipe 31, an outlet pipe 32, and a circulation pump 33. The inlet pipe 31 supplies acid or alkali for regeneration to the redox ion exchange composite fiber material 231 in the reaction zone 24. Specifically, the inlet pipe 31 extends to the top of the reaction zone 24 and supplies acid or alkali to the reaction zone 24 through a drain hole. The outlet pipe 32 collects the acid or alkali from the reaction zone 24. Under the action of the circulation pump 33, the acid or alkali collected by the outlet pipe 32 passes back through the circulation pump 33 and re-enters the reaction zone 24 through the inlet pipe 31.

[0025] Among them, the redox ion exchange composite fiber material uses acrylic fiber as the base material, and its viscosity-average molecular weight is 4.5×10⁻⁶. 4 -6.0×10 4 The initial diameter is 15-30 μm, and the porosity is 50-70%. Functional groups are introduced into the redox ion exchange composite fiber material through chemical grafting modification technology. The specific preparation method is as follows: 1) Substrate pretreatment: Place polycaprolactam fibers in Fe... 2+ Oxidation pretreatment is carried out in the H2O2 redox system to generate peroxy / hydroperoxy groups on the fiber surface, which serve as grafting active sites. 2) Graft copolymerization: The pretreated fibers are placed in a grafting reaction solution containing acrylonitrile (concentration 0.5-1.0 mol / L) and methacrylic acid (concentration 0.3-0.6 mol / L). The reaction is carried out at 60-70℃ for 2-4 hours with a bath ratio of 1:50 to 1:100 (fiber mass: solution volume). After the reaction, the fibers are repeatedly washed with hot water and ethanol to remove homopolymers and unreacted monomers. The grafting rate is controlled at 20-40%. 3) Amine oxime reaction: The grafted fibers are placed in a 0.5-1.0 mol / L hydroxylamine solution and reacted at 70-80℃ and pH 6.0-8.0 for 2-3 hours to convert some cyano groups into amine oxime groups (-C(NH2)=NOH), with the conversion rate controlled at 60-80%. The amine oxime group, as a redox active group, can initiate a free radical chain reaction. 4) Activation treatment: First, soak in 0.5 mol / L NaOH solution for 1-2 hours to convert the carboxyl group to the Na form and improve the ion exchange activity; after washing with water until neutral, soak in 0.5 mol / L HCl solution for 1-2 hours to convert the amylopyroxime group to the active form; finally, wash with water until neutral to obtain the final redox ion exchange composite fiber material. The redox ion exchange composite fiber material prepared using the above method has a total functional group capacity of 2.0-3.5 mmol / g, of which the redox active group capacity is 0.8-1.5 mmol / g (mercapto-aminooxime groups), and the ion exchange group capacity is 1.2-2.0 mmol / g (carboxyl groups). The specific surface area of ​​the fiber material is 0.8-1.5 m². 2 / g, with a fiber diameter of 15-30μm.

[0026] The number of reaction modules is determined based on the processing air volume: 1. The formula for calculating the air volume handled by a single module is: Q_single_module = A × v × 3600; Where: Q_single module = air volume processed by a single module (m³) 3 / h); A = Windward area of ​​a single module (m²) 2 v = Design filtration velocity (m / s).

[0027] 2. Relationship between module quantity and air volume: Air volume handling range: <1000m³ 3 / h, recommended number of reaction modules: 1, configuration method: single module, small distributed point source; Air volume handling range: 1000-5000m³ 3 / h, recommended number of reaction modules 2-4, in parallel, can be flexibly arranged according to space; Air volume handling range: 5000-20000 m³3 / h, the recommended number of reaction modules is 4-8, in parallel / series combination, using a grid or drawer-type layout; Air volume handling range: >20000m³ 3 / h, it is recommended that the number of reaction modules be greater than 8, and multiple units be connected in parallel. A flow equalization duct needs to be designed to ensure uniform airflow in each module.

[0028] 3. Formula for calculating the number of modules: N = Q_total / A × v × 3600 Where: N = number of required modules (rounded up); Qtotal = total air volume (m³ / s) 3 / h); A = windward area of ​​a single module (m²) 2 v = Design filtration velocity (m / s) 4. Module layout suggestions: Parallel connection is the primary method: Most odor treatment scenarios employ parallel module connection to reduce air resistance; Use series connection with caution: Unless there are extremely high emission requirements (such as in pharmaceutical or food processing plants), multi-stage series connection is not recommended as it increases resistance rapidly. Maintenance space: A maintenance passage of no less than 500mm is reserved between modules to facilitate replacement and regeneration operations; Typical wind speed range: 0.1-0.5 m / s.

[0029] Example 2 Based on the same technical concept, the present invention also provides an odor treatment method based on redox ion exchange fibers using the equipment provided in the above embodiments, comprising the following steps: S1. The odor is collected through a gas collection hood and piping system. The ammonia concentration in the collected odor is approximately 5-15 mg / m³. 3 The hydrogen sulfide concentration is approximately 2-8 mg / m³. 3 The specific concentration varies depending on the pollution source. The odorous gas is first pretreated by a centrifuge and electrostatic precipitator to remove particulate impurities. After pretreatment, the outlet particulate matter concentration is less than 1 mg / m³. 3 ; S2. The odor gas after pretreatment in step S1 is passed through a reaction zone filled with redox ion exchange composite fiber material; the empty bed residence time (EBRT) of the odor gas and the fiber material is 0.5-2.0s, and the designed filtration velocity is 0.1-0.5m / s. Within the reaction zone, the ion-exchange groups (carboxyl groups) supported on the redox ion-exchange composite fiber material undergo ion exchange with the target pollutants in the odor gas, achieving selective adsorption. Specifically, the carboxyl groups undergo an ion exchange reaction with ammonia (an alkaline gas), adsorbing and fixing the ammonia; simultaneously, the redox active groups (mercaptooxime groups) initiate a free radical chain reaction, generating hydroxyl radicals (·OH) and superoxide anions (O2). - Highly reactive free radicals, such as carbon dioxide and water, catalytically degrade adsorbed pollutants into harmless products. The treated gas is discharged through the outlet. Testing showed that the ammonia emission concentration was ≤0.5ppm, the hydrogen sulfide emission concentration was ≤0.05ppm, the removal rate was ≥99%, and the odor concentration met national and local emission standards. S3. When the adsorption capacity of the redox ion exchange composite fiber material reaches the threshold (manifested as the operating resistance of the reaction module increases to twice the initial resistance), the system automatically triggers the regeneration program to perform acid and alkali washing treatment, restore the adsorption and catalytic activity of the fiber material, and realize recycling.

[0030] The regeneration process is as follows: Alkaline washing: Prepare a 3% NaOH solution (approximately 0.75 mol / L) and dynamically circulate it to clean the fiber module for 40 minutes at a flow rate of 0.8 m³ / h·m² to remove adsorbed acidic gases such as hydrogen sulfide; Washing: Rinse the fiber module with clean water for 15 minutes until the pH value of the discharged wastewater drops to 8-9; Acid washing: Prepare a 3% HCl solution (approximately 0.82 mol / L) and dynamically circulate it at the same flow rate for 40 minutes to remove adsorbed alkaline gases such as ammonia; Final rinse: Rinse the fiber module thoroughly with clean water for 20-30 minutes until the pH value of the discharged wastewater reaches 6-8, indicating that regeneration is complete; After being processed by this regeneration process, the adsorption capacity of the fiber material can be restored to more than 90% of its initial value, ensuring that the material can be recycled.

[0031] Test case Test Example 1 Ammonia (NH3) treatment effect test.

[0032] Reference Figure 3 , Figure 3 The graph shows the NH3 treatment effect. Test conditions: ammonia inlet concentration 150-200 ppm, initial regeneration 20 min, no regeneration during the middle, continuous operation; equipment resistance 30 Pa during operation. Test results show that within 300 min of operation, the ammonia emission concentration remained at a near-zero emission level (≤0.5 ppm), and the removal rate remained stable at over 99%.

[0033] Test Example 2 Test on the effectiveness of hydrogen sulfide (H2S) treatment.

[0034] Reference Figure 4 , Figure 4 The graph shows the H2S treatment effect. Test conditions: H2S inlet concentration 50-60 ppm, initial regenerator concentration 3%, online regeneration, continuous operation; pressure change during regeneration approximately 10 Pa. Test results show that within 330 minutes of operation, the hydrogen sulfide emission concentration remained at near-zero emission levels (≤0.05 ppm), and the removal rate remained stable at over 99%.

[0035] Test Example 3: Test on the treatment effect of mixed odor (NH3+H2S+methanethiol).

[0036] To verify the treatment effect of the device and method of the present invention under the condition of coexistence of multiple polluting gases, a mixed odor treatment effect test was conducted.

[0037] Test conditions: Inlet gas composition: NH3 (80-120ppm), H2S (30-50ppm), CH3SH (10-20ppm), simulating typical odor components of landfills and wastewater treatment plants; gas flow rate: 1.5-2.0m³ / h. 3 / h; relative humidity 60%±5%; temperature 25℃±2℃; fiber layer thickness 80mm (three-layer gradient structure). The operation mode is continuous operation, without regeneration, to investigate the saturation cycle under mixed gas conditions. The outlet concentrations of NH3, H2S, and CH3SH, as well as the bed pressure differential, are sampled and monitored every 30 minutes.

[0038] The test results revealed the following: 1. The material exhibited higher adsorption selectivity for NH3 than for H2S and CH3SH, which is related to the strong ion exchange interaction between NH3, as an alkaline gas, and the carboxyl groups on the fiber; 2. The presence of H2S did not significantly inhibit NH3 removal; on the contrary, the catalytic oxidation of H2S by redox active groups (generating elemental sulfur or sulfate) may have created an acidic microenvironment, aiding NH3 adsorption; 3. As a neutral molecule, CH3SH primarily relied on the catalytic decomposition of redox active groups, with a breakthrough time earlier than that of ion-exchange dominated gases. Under the test conditions, the removal rate of CH3SH reached over 95% in the initial stage of operation, gradually decreasing with prolonged operation, but still maintaining a removal rate of over 80%.

[0039] Test Example 4 Mixed Odor and Online Regeneration Validation Test To further verify the regeneration performance and cycle life of the fiber material, an online regeneration verification test using mixed odor gas was conducted.

[0040] Test conditions: Intake air composition was the same as in Test Example 3; the operating cycle was 240 minutes (close to the H2S breakthrough point), followed by regeneration, and then another cycle, repeated 5 times. Regeneration was performed using dynamic circulation cleaning with 3% NaOH and 3% HCl for 30 minutes each. Monitoring indicators included the removal rate recovery rate and performance degradation trend after each regeneration.

[0041] Test results: After the first three regenerations, the removal rates of NH3, H2S, and CH3SH all recovered to over 90% of their initial values. After the fourth and fifth regenerations, the removal of methanethiol showed the first decline (recovery rate dropped to around 85%), suggesting that there may have been a small amount of irreversible loss of redox groups. Overall, this fiber material exhibits good regeneration performance and recycling capability.

[0042] Application examples As shown in Table 1, Table 1 is a partial list of equipment applications.

[0043]

[0044] As shown in Table 1, in practical applications, it is generally agreed that the superior adsorption and regeneration performance of the redox ion exchange composite fiber material enables the purification of odor in various structures of the sewage treatment plant. It can also achieve "on-demand purification and near-zero emissions" at different times according to the composition, concentration, and operating time of the waste gas in different facilities, and greatly saves operating costs.

[0045] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An odor treatment method based on redox ion exchange fibers, characterized in that, Includes the following steps: 1) Odor collection and pretreatment of odor to remove particulate impurities from the odor; 2) The odorous gas pretreated in step 1) is passed into a reaction zone filled with redox ion exchange composite fiber material. Through the free radical chain reaction initiated by the redox active groups, the adsorbed pollutants are catalytically degraded into harmless products and then discharged. 3) When the redox ion exchange composite fiber material in step 2) reaches adsorption saturation, it is regenerated by acid and alkali washing to restore the adsorption and catalytic activity of the fiber material and achieve recycling.

2. The odor treatment method based on redox ion exchange fibers according to claim 1, characterized in that, The redox ion exchange composite fiber material is prepared by introducing redox active groups and ion exchange groups onto the fiber surface through chemical grafting modification. The redox active group is at least one of a hydroxyl radical precursor group and a superoxide anion precursor group; the ion exchange group is at least one of an amino group, a carboxyl group, and a sulfonic acid group.

3. The odor treatment method based on redox ion exchange fibers according to claim 1, characterized in that, In step 2), the empty bed residence time of the odor gas with the redox ion exchange composite fiber material is 0.5-2.0 s; The target pollutants in the odor include at least one of ammonia and hydrogen sulfide.

4. The odor treatment method based on redox ion exchange fibers according to claim 1, characterized in that, In step 3), the acid-base washing treatment uses alternating washing with sodium hydroxide solution and hydrochloric acid solution; The adsorption saturation state of the redox ion exchange composite fiber material is determined by the reaction module's operating resistance reaching twice the initial resistance.

5. The odor treatment method based on redox ion exchange fibers according to claim 4, characterized in that, The concentrations of the sodium hydroxide solution and the hydrochloric acid solution are both 0.5 mol / L. The acid-base washing treatment takes 1-2 hours.

6. An odor treatment device based on redox ion exchange fibers for implementing the method as described in any one of claims 1-5, characterized in that, include: The housing (2) is provided with an air inlet (21) and an air outlet (22). At least one set of reaction modules (23) are disposed inside the shell (2), and the reaction modules (23) are filled with redox ion exchange composite fiber material (231) to form a reaction zone (24).

7. The odor treatment device based on redox ion exchange fiber according to claim 6, characterized in that, Processing air volume <1000m³ 3 When / h, the number of reaction modules (23) is one set; Air volume handled: 1000-5000m³ 3 When / h, the number of reaction modules (23) is two to four groups; Air volume handling capacity: 5000-20000m³ 3 When / h, the number of reaction modules (23) is four to eight groups; Air volume > 20000m³ 3 When / h, the number of reaction modules (23) is greater than eight groups.

8. The odor treatment device based on redox ion exchange fiber according to claim 6, characterized in that, The reaction module (23) is provided with three layers of redox ion exchange composite fiber material (231) arranged along the direction of odor flow, and the filling density ratio of the three layers of redox ion exchange composite fiber material (231) arranged along the direction of odor flow is 1.5:1.2:1.0; The redox ion exchange composite fiber material (231) has a fiber diameter of 15-30 μm and a specific surface area of ​​0.8-1.5 m². 2 / g.

9. The odor treatment device based on redox ion exchange fiber according to claim 6, characterized in that, It also includes a preprocessing unit (1); The pretreatment unit (1) is located between the air inlet (21) and the reaction module (23). The pretreatment unit (1) includes a centrifugal separator (11) and an electrostatic precipitator (12).

10. The odor treatment device based on redox ion exchange fiber according to claim 6, characterized in that, It also includes a circulation system (3), which includes a feed pipe (31), a discharge pipe (32) and a circulation pump (33). The feed pipe (31) is used to provide acid or alkali solution for regeneration to the redox ion exchange composite fiber material (231) in the reaction zone (24), and the discharge pipe (32) is used to collect the acid or alkali solution in the reaction zone (24).

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