Air pollutant filtering system and method

Abstract

The invention relates to the field of air purification, and discloses an air pollutant filtering system which comprises an air inlet unit, a refrigeration unit, an adsorption unit, an adsorption regeneration unit and a pollutant retention unit, external environment air is introduced into the refrigeration unit through an air inlet of the air inlet unit, the air is pre-cooled through the refrigeration unit, and the pollutant retention unit is communicated with the adsorption regeneration unit; the pre-cooled air is introduced into an adsorption bed of the adsorption unit, the adsorption bed adsorbs pollutants in the air, and the adsorbed air is discharged from an air outlet; when the adsorption bed loses efficacy, the adsorption regeneration unit is used for desorbing the adsorption bed; and the pollutant retention unit can perform retention treatment on pollutants released by the adsorption regeneration unit. The adsorption and regeneration unit is used for desorbing the failed adsorption bed, so that the system can continuously filter and purify air, the air purification efficiency of the system is improved, pollutants which are released by the adsorption and regeneration unit and are not suitable for being discharged are introduced into the pollutant retention unit for retention treatment, and secondary pollution is avoided.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and in particular to an air pollutant filtration system and method. Background Technology

[0002] Excessive levels of air pollutants such as radon, formaldehyde, benzene, toluene, and total volatile organic compounds (TVOC) in indoor public environments pose a significant threat to human health. Radon, in particular, is classified as a Group 1 carcinogen by the World Health Organization and is the second leading cause of lung cancer after smoking. With rapid urbanization, people are entering indoor public places such as shopping malls, office buildings, and underground parking lots more frequently and spending longer periods there. Therefore, the potential health threats posed by indoor air pollutants must be taken very seriously.

[0003] Opening windows for ventilation is a fundamental and effective way to reduce indoor air pollutant concentrations. Air circulation allows accumulated harmful gases to be expelled and fresh air to be introduced, thus diluting pollutant levels. However, in the cold winter, people often keep doors and windows tightly closed to maintain indoor warmth and reduce heat loss; similarly, in the hot summer, they choose to close doors and windows to prevent the loss of cool air from air conditioning, thus achieving energy conservation. In these situations, people often overlook the importance of regular ventilation in reducing the harm of indoor air pollutants. Furthermore, in some underground spaces such as shopping malls, subway tunnels, and underground warehouses where ventilation is limited or natural ventilation is poor, air pollutants cannot effectively disperse, especially radon gas concentrations, which can accumulate continuously. Prolonged exposure to such environments poses a serious threat to the health of staff and workers, highlighting significant health risks. Currently, existing indoor air pollutant adsorption and filtration methods on the market, such as activated carbon adsorption and filter screen filtration, have significant limitations. These methods are difficult to continuously treat air pollutants over long periods of time. Once the adsorption material reaches saturation, it can no longer function and is prone to secondary pollution. Overall, the effectiveness of adsorption and filtration is poor, failing to meet practical needs. There is an urgent need to develop more efficient and durable air purification technologies and products. Summary of the Invention

[0004] The purpose of this invention is to provide an air pollutant filtration system and method to solve the problems existing in the above-mentioned related technologies, so that the air pollutant filtration system can continuously purify and filter the air, meet the air purification needs of spaces that are not easily ventilated, and improve the air purification efficiency.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides an air pollutant filtration system, comprising: An air intake unit, the air intake unit including an air intake port, the air intake port being connected to the external environment; A refrigeration unit capable of pre-cooling the air entering through the air inlet; An adsorption unit, comprising an adsorption bed connected to a refrigeration unit, wherein the adsorption bed is capable of adsorbing and purifying pre-cooled air, and wherein the adsorption bed has an air outlet connected to the external environment. An adsorption regeneration unit is connected to the adsorption unit and is capable of desorbing the adsorption bed. A pollutant retention unit is connected to the adsorption unit, and the pollutant retention unit is capable of retaining and treating the pollutants released by the adsorption and regeneration unit.

[0006] Preferably, the air intake unit is connected to the refrigeration unit via an air intake fan.

[0007] Preferably, the refrigeration unit includes a compressor and a heat exchanger to pre-cool the air entering the adsorption unit.

[0008] Preferably, the number of adsorption beds is multiple, the adsorption beds are arranged in parallel, and each adsorption bed corresponds to one adsorption regeneration unit; The adsorption bed is connected to temperature and pressure sensors.

[0009] Preferably, the adsorption regeneration unit includes a temperature control mechanism that can heat the adsorption bed, and the temperature control mechanism corresponds one-to-one with the adsorption bed; the adsorption bed is connected to the pollutant retention unit via a vacuum pump so that the pollutants released by the desorption of the adsorption bed enter the pollutant retention unit; A radon meter is installed between the adsorption regeneration unit and the pollutant retention unit to monitor the radon concentration at the outlet of the adsorption regeneration unit.

[0010] Preferably, the pollutant retention unit includes a cooling mechanism and a retention bed, wherein the cooling mechanism is disposed between the vacuum pump and the retention bed.

[0011] Preferably, the vacuum pump is further connected to an exhaust pipe, one end of which is connected to the outlet of the vacuum pump, and the other end of which is connected to the external environment. A second regeneration exhaust solenoid valve is provided on the exhaust pipe.

[0012] Preferably, the adsorption unit is connected to a measurement and control mechanism, which includes a measuring instrument and a controller. The measuring instrument can monitor the pollutant concentration at the outlet to determine whether the adsorption bed has failed. The outlet is equipped with an adsorption outlet solenoid valve. The measuring instrument, the adsorption bed, the adsorption regeneration unit, and the adsorption outlet solenoid valve are all communicatively connected to the controller.

[0013] Preferably, an adsorption air inlet solenoid valve is provided between the refrigeration unit and the adsorption bed, and the adsorption air inlet solenoid valve corresponds one-to-one with the adsorption bed.

[0014] The present invention also provides a method for removing air pollutants, utilizing the above-described air pollutant filtration system, comprising the following steps: Ambient air is introduced into the refrigeration unit through the air inlet of the air intake unit. The refrigeration unit pre-cools the air. The pre-cooled air is then introduced into the adsorption bed of the adsorption unit. The adsorption bed adsorbs pollutants in the air. The adsorbed air is then discharged through the air outlet. When the adsorption bed fails, the adsorption regeneration unit is used to desorb the adsorption bed; the pollutant retention unit can retain the pollutants released by the adsorption regeneration unit.

[0015] The present invention achieves the following technical advantages over related technologies: The air pollutant filtration system of the present invention includes an air intake unit, a cooling unit, an adsorption unit, an adsorption regeneration unit, and a pollutant retention unit. The air intake unit includes an air inlet connected to the external environment; the cooling unit pre-cools the air entering through the air inlet; the adsorption unit includes an adsorption bed connected to the cooling unit, which adsorbs and purifies the pre-cooled air, and has an air outlet connected to the external environment; the adsorption regeneration unit is connected to the adsorption unit and desorbs pollutants from the adsorption bed; the pollutant retention unit is connected to the adsorption unit and retains pollutants released by the adsorption regeneration unit.

[0016] In this invention's air pollutant filtration system, during operation, ambient air is introduced into the cooling unit through the air inlet of the intake unit. The cooling unit pre-cools the air, which then enters the adsorption bed of the adsorption unit. The adsorption bed adsorbs pollutants from the air, and the adsorbed air is discharged through the outlet. When the adsorption bed becomes ineffective, an adsorption regeneration unit desorbs the adsorption bed. A pollutant retention unit can retain the pollutants released by the adsorption regeneration unit. This air pollutant filtration system utilizes the adsorption regeneration unit to desorb the failed adsorption bed, enabling the system to continuously filter and purify the air, thus improving the system's air purification efficiency. Pollutants unsuitable for emission released by the adsorption regeneration unit are retained by the pollutant retention unit to prevent secondary pollution.

[0017] The present invention also provides an air pollutant filtration method. By utilizing the air pollutant filtration system described above, the air pollutant filtration method of the present invention can naturally achieve the same beneficial effects. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the air pollutant filtration system disclosed in the embodiments of the present invention; Figure 2 This is a schematic diagram simulating an experimental environment using the air pollutant filtration method disclosed in the embodiments of the present invention; Figure 3 This is a schematic diagram showing the fitting of the change of radon concentration in a room over time under different experimental conditions of temperature and radon generation rate in a simulation experiment.

[0020] In the diagram: 1. Air inlet; 2. Air intake fan; 3. Refrigeration unit; 4. First adsorption air intake solenoid valve; 5. Second adsorption air intake solenoid valve; 6. First adsorption bed; 7. Second adsorption bed; 8. First measurement and control mechanism; 9. Second measurement and control mechanism; 10. First adsorption air outlet solenoid valve; 11. Throttling valve; 12. Regeneration solenoid valve; 13. Second adsorption air outlet solenoid valve; 14. First air outlet; 15. Second air outlet; 16. First temperature control mechanism; 17. Second temperature control mechanism; 18. First regeneration air intake solenoid valve; 19. Second regeneration air intake solenoid valve; 20. Radon detector at regeneration air outlet; 21. Vacuum pump; 22. First regeneration air outlet solenoid valve; 23. Second regeneration air outlet solenoid valve; 24. Cooling mechanism; 25. Retention bed; 26. Exhaust pipe; 27. First temperature and pressure sensor; 28. Second temperature and pressure sensor. Detailed Implementation

[0021] 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.

[0022] The purpose of this invention is to provide an air pollutant filtration system and method to solve the problems existing in the above-mentioned related technologies, so that the air pollutant filtration system can continuously purify and filter the air, meet the air purification needs of spaces that are not easily ventilated, and improve the air purification efficiency.

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1 This embodiment provides an air pollutant filtration system. Please refer to [link / reference]. Figures 1-3 The system includes an air intake unit, a cooling unit 3, an adsorption unit, an adsorption regeneration unit, and a pollutant retention unit. The air intake unit includes an air inlet 1 connected to the external environment. The cooling unit 3 pre-cools the air entering through the air inlet 1. The adsorption unit includes an adsorption bed connected to the cooling unit 3, which adsorbs and purifies the pre-cooled air. The adsorption bed has an air outlet connected to the external environment. The adsorption regeneration unit is connected to the adsorption unit and desorbs pollutants from the adsorption bed. The pollutant retention unit is connected to the adsorption unit and retains pollutants released by the adsorption regeneration unit.

[0025] In the air pollutant filtration system of the present invention, during operation, ambient air is introduced into the cooling unit 3 through the air inlet 1 of the air intake unit. The cooling unit 3 pre-cools the air, and the pre-cooled air is then introduced into the adsorption bed of the adsorption unit. The adsorption bed adsorbs pollutants in the air, and the adsorbed air is discharged through the air outlet. When the adsorption bed becomes ineffective, it is desorbed using an adsorption regeneration unit. The pollutant retention unit can retain the pollutants released by the adsorption regeneration unit. The air pollutant filtration system of the present invention utilizes the adsorption regeneration unit to desorb the failed adsorption bed, enabling the system to continuously filter and purify the air, thus improving the air purification efficiency. Pollutants unsuitable for emission released by the adsorption regeneration unit are retained by the pollutant retention unit to prevent secondary pollution.

[0026] The air intake unit is connected to the refrigeration unit 3 via an air intake fan 2. The air intake unit uses the air intake fan 2 to supply air to the system, ensuring that the air to be purified reaches the adsorption unit smoothly and guaranteeing the reliability of the system operation. In practical applications, a high-pressure fan can be used to supply positive pressure air to the adsorption bed, creating a positive pressure environment. This positive pressure facilitates the adsorption of pollutants by the adsorption bed, ensuring that the performance of the adsorption unit can be fully utilized.

[0027] Specifically, the refrigeration unit 3 includes a compressor and a heat exchanger to pre-cool the air entering the adsorption unit, so that the adsorption material inside the adsorption unit is in a stable low temperature environment (≤15℃) during operation, thereby ensuring that the adsorption coefficient of the adsorption material remains stable at a high level and enhancing the adsorption effect of the adsorption bed.

[0028] To enhance system operational stability, multiple adsorption beds are used, connected in parallel. Each adsorption bed corresponds one-to-one with an adsorption-regeneration unit. Even if some adsorption beds fail, the system can still utilize the remaining beds to adsorb pollutants from the air, ensuring continuous and uninterrupted air purification and improving the system's air purification efficiency. In practical applications, temperature and pressure sensors are connected to the adsorption beds to monitor their operating parameters, improving operator convenience and ensuring smooth system operation. The one-to-one correspondence between adsorption beds and temperature and pressure sensors facilitates monitoring of multiple adsorption beds separately, enhancing system controllability.

[0029] It should also be explained here that, in practical applications, the adsorption material filling the adsorption bed can be adjusted according to the specific operating conditions and purification needs. The adsorption material includes, but is not limited to, activated carbon, organometallic framework materials, silica gel, etc. Taking activated carbon as an example, it can adsorb and filter out various indoor air pollutants, especially radon. Activated carbon modified by liquid nitrogen, KOH, etc., can achieve an adsorption coefficient of 8 L / g for radon in the 0℃~15℃ environment created by the refrigeration unit 3.

[0030] More specifically, the adsorption regeneration unit includes a temperature control mechanism that heats the adsorption bed. Each temperature control mechanism corresponds to one adsorption bed. The adsorption bed is connected to the pollutant retention unit via a vacuum pump 21, allowing pollutants released from desorption in the adsorption bed to enter the pollutant retention unit. After a particular adsorption bed completes adsorption, its associated temperature control mechanism activates the heating mode to heat it. After heating, the vacuum pump 21 activates to create negative pressure, using a small airflow to purge the adsorption bed and achieve high-temperature negative pressure desorption. After desorption, the temperature control mechanism cools the bed so it can be quickly reused, ensuring system efficiency.

[0031] A radon meter 20 is installed between the adsorption regeneration unit and the pollutant retention unit. The radon meter 20 is used to monitor the desorption of the adsorption bed. When the radon concentration at the outlet of the adsorption regeneration unit is reduced to a normal level, the adsorption bed that is desorbing is switched to the cooling stage.

[0032] The pollutant retention unit includes a cooling mechanism 24 and a retention bed 25, with the cooling mechanism 24 positioned between the vacuum pump 21 and the retention bed 25. This invention addresses situations where pollutants cannot be discharged externally. It cools the pollutant-containing gas generated by the adsorption-regeneration unit before introducing it into the retention bed 25 for retention treatment, thus avoiding secondary pollution and improving the system's reliability. In cases where pollutants cannot be discharged externally, the high temperature of the pollutant-containing gas generated by the adsorption-regeneration unit is detrimental to the adsorption of pollutants by the adsorbent material in the retention bed 25. Therefore, it must first be cooled by the cooling mechanism 24 before being introduced into the retention bed 25 for retention treatment. Under the condition of treating the small airflow generated by the adsorption-regeneration unit, the adsorbent material in the retention bed 25 effectively retains radon for a time longer than eight half-lives of radon, thereby achieving on-site harmless treatment of radon.

[0033] It should be noted that the vacuum pump 21 is also connected to an exhaust pipe 26. One end of the exhaust pipe 26 is connected to the outlet of the vacuum pump 21, and the other end is connected to the external environment. For ease of control, a first regeneration exhaust solenoid valve 22 is installed between the vacuum pump 21 and the pollutant retention unit, and a second regeneration exhaust solenoid valve 23 is installed on the exhaust pipe 26. If the pollutant-containing gas generated during the desorption process meets the discharge standards and can be discharged, the second regeneration exhaust solenoid valve 23 is opened, and the gas is discharged from the exhaust pipe 26.

[0034] Furthermore, the adsorption unit is connected to a monitoring and control mechanism, which includes a measuring instrument and a controller. The measuring instrument can monitor the pollutant concentration at the outlet to determine whether the adsorption bed has failed. An adsorption outlet solenoid valve is installed at the outlet. The measuring instrument, adsorption bed, adsorption regeneration unit, and adsorption outlet solenoid valve are all communicatively connected to the controller. The measuring instrument monitors the pollutant concentration to determine whether the adsorption bed has failed, so that the controller can control the failed adsorption bed to enter the desorption regeneration state, and control the adsorption bed that has completed desorption regeneration to enter the adsorption state. It should be noted that the specific type of measuring instrument can be selected according to the actual operating conditions. When the adsorption bed is mainly used to adsorb the pollutant radon, the measuring instrument can monitor the radon concentration at the outlet. Additionally, the specific structure and working principle of the controller are common knowledge to those skilled in the art and will not be elaborated here.

[0035] To facilitate control of the airflow direction entering the system, an adsorption inlet solenoid valve is installed between the refrigeration unit 3 and the adsorption bed. Each adsorption inlet solenoid valve corresponds to one adsorption bed, improving the system's controllability and making it easier for operators to operate.

[0036] Example 2 This embodiment provides an air pollutant filtration system. In this specific embodiment, there are two sets of adsorption beds: a first adsorption bed 6 and a second adsorption bed 7. A first adsorption inlet solenoid valve 4 is installed between the first adsorption bed 6 and the cooling unit 3, and a second adsorption inlet solenoid valve 5 is installed between the second adsorption bed 7 and the cooling unit 3. The first adsorption bed 6 is connected to a first temperature control mechanism 16, and the second adsorption bed 7 is connected to a second temperature control mechanism 17. The first adsorption bed 6 is also connected to a first measurement and control mechanism 8, which is located between the first adsorption bed 6 and the first air outlet 14. A first adsorption outlet solenoid valve 10 is provided between the first adsorption bed 14 and the second outlet 15. The second adsorption bed 7 is connected to a second control mechanism 9, which is located between the second adsorption bed 7 and the second outlet 15. A second adsorption outlet solenoid valve 13 is provided between the second control mechanism 9 and the second outlet 15. The first outlet 14 can be connected to the second outlet 15, and a throttling valve 11 and a regeneration solenoid valve 12 are provided between them. Correspondingly, a first regeneration inlet solenoid valve 18 is provided between the first adsorption bed 6 and the vacuum pump 21, and a second regeneration inlet solenoid valve 19 is provided between the second adsorption bed 7 and the vacuum pump 21, thereby improving the controllability of the system.

[0037] In other embodiments achievable by this invention, the intake fan 2 and the cooling unit 3 can be kept in a normally open state to ensure that the adsorption unit is always in a low-temperature positive pressure state during operation, thereby stabilizing the performance of the adsorption material at a high level. The throttle valve 11 is configured with a relatively small flow rate.

[0038] In other embodiments achievable by the present invention, when the second measurement and control mechanism 9 detects a failure signal in the second adsorption bed 7, the first adsorption bed 6 will begin adsorption, and the second adsorption bed 7 will begin desorption and regeneration.

[0039] To facilitate monitoring of the working status of the adsorption beds, the first adsorption bed 6 is connected to a first temperature and pressure sensor 27, and correspondingly, the second adsorption bed 7 is connected to a second temperature and pressure sensor 28, further improving the controllability of the system and providing convenience for operators to monitor the working status of the system in real time.

[0040] In other embodiments achievable by the present invention, the radon detector 20 at the regeneration outlet detects that the radon concentration at the outlet of the adsorption regeneration unit has decreased to a normal level, opens the first adsorption inlet solenoid valve 4 and the first adsorption outlet solenoid valve 10, closes the second adsorption inlet solenoid valve 5, the regeneration solenoid valve 12, the second adsorption outlet solenoid valve 13, the first regeneration inlet solenoid valve 18, and the second regeneration inlet solenoid valve 19, and the second temperature control mechanism 17 starts the heating mode. At this time, the first adsorption bed 6 is in the adsorption state and the second adsorption bed 7 is in the heating stage.

[0041] In other embodiments achievable by this invention, the first adsorption inlet solenoid valve 4, the first adsorption outlet solenoid valve 10, the regeneration solenoid valve 12, and the second regeneration inlet solenoid valve 19 are opened, while the second adsorption inlet solenoid valve 5, the second adsorption outlet solenoid valve 13, and the first regeneration inlet solenoid valve 18 are closed. The second temperature control mechanism 17 is closed, and the vacuum pump 21 is started. At this time, the first adsorption bed 6 is in the adsorption state, and the second adsorption bed 7 is in the desorption state. If the pollutant-containing gas generated by desorption is easily discharged, the second regeneration outlet solenoid valve 23 is opened, and the first regeneration outlet solenoid valve 22 is closed. If the pollutant-containing gas generated by desorption is difficult to discharge, the first regeneration outlet solenoid valve 22 is opened, the second regeneration outlet solenoid valve 23 is closed, and the cooling mechanism 24 is started to cool the pollutant-containing gas generated by desorption before it enters the retention bed 25.

[0042] In other embodiments achievable by the present invention, the first adsorption inlet solenoid valve 4 and the first adsorption outlet solenoid valve 10 are opened, the second adsorption inlet solenoid valve 5, the regeneration solenoid valve 12, the second adsorption outlet solenoid valve 13, the first regeneration inlet solenoid valve 18, and the second regeneration inlet solenoid valve 19 are closed, the vacuum pump 21 is turned off, and the second temperature control mechanism 17 starts the cooling mode. At this time, the first adsorption bed 6 is in the adsorption state, and the second adsorption bed 7 is in the cooling stage.

[0043] In other embodiments achievable by the present invention, the first monitoring and control mechanism 8 detects a failure signal in the first adsorption bed 6, closes all solenoid valves, the second adsorption bed 7 will begin adsorption, and the first adsorption bed 6 will begin desorption and regeneration.

[0044] In other embodiments achievable by the present invention, the second adsorption inlet solenoid valve 5 and the second adsorption outlet solenoid valve 13 are opened, the first adsorption inlet solenoid valve 4, the regeneration solenoid valve 12, the first adsorption outlet solenoid valve 10, and the second regeneration inlet solenoid valve 19 are closed, the vacuum pump 21 is turned off, and the first temperature control mechanism 16 starts the heating mode. At this time, the first adsorption bed 6 is in the heating state, and the second adsorption bed 7 is in the adsorption stage.

[0045] In other embodiments achievable by the present invention, the first temperature and pressure sensor 27 detects that the temperature of the first adsorption bed 6 has reached a preset value, opens the second adsorption inlet solenoid valve 5, the regeneration solenoid valve 12, the second adsorption outlet solenoid valve 13, and the first regeneration inlet solenoid valve 18, and closes the first adsorption inlet solenoid valve 4, the first adsorption outlet solenoid valve 10, and the second regeneration inlet solenoid valve 19. The first temperature control mechanism 16 is closed, and the vacuum pump 21 is started. At this time, the first adsorption bed 6 is in a desorption state, and the second adsorption bed 7 is in an adsorption state. If the pollutant-containing gas generated by desorption is easily discharged, the second regeneration outlet solenoid valve 23 is opened, and the first regeneration outlet solenoid valve 22 is closed. If the pollutant-containing gas generated by desorption is difficult to discharge, the first regeneration outlet solenoid valve 22 is opened, the second regeneration outlet solenoid valve 23 is closed, and the cooling mechanism 24 is started to cool the pollutant-containing gas generated by desorption before it enters the retention bed 25.

[0046] In other embodiments achievable by the present invention, the radon detector 20 at the regeneration outlet detects that the radon concentration at the outlet of the adsorption regeneration unit has decreased to a normal level, opens the second adsorption inlet solenoid valve 5 and the second adsorption outlet solenoid valve 13, and closes the first adsorption inlet solenoid valve 4, the regeneration solenoid valve 12, the first adsorption outlet solenoid valve 10, the first regeneration inlet solenoid valve 18, and the second regeneration inlet solenoid valve 19. The second temperature control mechanism 17 starts the cooling mode. At this time, the first adsorption bed 6 is in a cooling state, and the second adsorption bed 7 is in the adsorption stage.

[0047] The air pollutant filtration method of the present invention adopts an adsorption bed alternating adsorption filtration purification method, and utilizes online rapid regeneration technology of adsorption materials to achieve alternating adsorption filtration of air pollutants (especially radon) in a dual carbon bed, thereby achieving the purpose of continuous and efficient purification of indoor air in poorly ventilated spaces.

[0048] The other structures of the air pollutant filtration system in this embodiment are the same as those in Embodiment 1, and will not be described again here.

[0049] Example 3 This embodiment provides an air pollutant filtration method, utilizing the air pollutant filtration system of Embodiment 1 or Embodiment 2, including the following steps: External ambient air is introduced into the cooling unit 3 through the air inlet 1 of the air intake unit. The cooling unit 3 pre-cools the air. The pre-cooled air is then introduced into the adsorption bed of the adsorption unit. The adsorption bed adsorbs pollutants in the air. The air after adsorption is discharged through the air outlet. When the adsorption bed fails, the adsorption regeneration unit is used to desorb the adsorption bed; the pollutant retention unit can retain the pollutants released by the adsorption regeneration unit.

[0050] The air pollutant filtration method of the present invention utilizes an adsorption regeneration unit to desorb the failed adsorption bed, thereby achieving continuous and uninterrupted air filtration and purification. This solves the problem that existing technologies cannot meet the needs of continuous and rapid air purification in indoor public places. Pollutants that are not suitable for emission released by the adsorption regeneration unit are passed into a pollutant retention unit for retention treatment to avoid secondary pollution.

[0051] To verify the actual effectiveness of the air pollutant filtration method of the present invention, this embodiment places the air pollutant filtration system of Embodiment 1 or Embodiment 2 in a radon exposure chamber (96.1m). 3 Using a flow-type radon source (radon generation rate 471 Bq / min) and a series of air pumps and flow meters, according to... Figure 2 The connection method is used to simulate the experimental environment. A radon source is connected to the experimental room to supply radon into the room, simulating different experimental conditions. Simultaneously, activated carbon is connected to the radon source to adsorb radon, thereby adjusting the radon concentration in the room to meet the simulation of different experimental conditions. The experimental prototype made using the air pollutant filtration system of Example 1 or Example 2 is placed in the room. A fan is installed in the room to ensure uniform radon distribution. A radon meter is connected to the room to monitor whether the radon concentration meets the experimental conditions. Based on this, a series of tests are conducted to evaluate the purification capacity of this method for radon in the air under different environments.

[0052] The fitting results of the indoor radon concentration P versus time under experimental conditions of different temperatures and radon generation rates are as follows: Figure 3 As shown in Tables 1 and 2 below, details the changes in radon concentration in the room under different experimental conditions, as well as the specific data on the changes in radon concentration over time under different temperatures and radon generation rates.

[0053] Table 1: Changes in radon concentration in the room under different experimental conditions

[0054] Table 2: Radon removal rate of the equipment at different time periods under different experimental conditions

[0055] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An air pollutant filtration system, characterized in that, include: An air intake unit, the air intake unit including an air intake port, the air intake port being connected to the external environment; A refrigeration unit capable of pre-cooling the air entering through the air inlet; An adsorption unit, comprising an adsorption bed connected to a refrigeration unit, wherein the adsorption bed is capable of adsorbing and purifying pre-cooled air, and wherein the adsorption bed has an air outlet connected to the external environment. An adsorption regeneration unit is connected to the adsorption unit and is capable of desorbing the adsorption bed. A pollutant retention unit is connected to the adsorption unit, and the pollutant retention unit is capable of retaining and treating the pollutants released by the adsorption and regeneration unit.

2. The air pollutant filtration system according to claim 1, characterized in that: The air intake unit is connected to the refrigeration unit via an air intake fan.

3. The air pollutant filtration system according to claim 1, characterized in that: The refrigeration unit includes a compressor and a heat exchanger to pre-cool the air entering the adsorption unit.

4. The air pollutant filtration system according to claim 1, characterized in that: The number of adsorption beds is multiple, the adsorption beds are arranged in parallel, and each adsorption bed corresponds to one adsorption regeneration unit; The adsorption bed is connected to temperature and pressure sensors.

5. The air pollutant filtration system according to claim 4, characterized in that: The adsorption regeneration unit includes a temperature control mechanism that can heat the adsorption bed. The temperature control mechanism corresponds one-to-one with the adsorption bed. The adsorption bed is connected to the pollutant retention unit via a vacuum pump so that the pollutants released by the desorption of the adsorption bed enter the pollutant retention unit. A radon meter is installed between the adsorption regeneration unit and the pollutant retention unit to monitor the radon concentration at the outlet of the adsorption regeneration unit.

6. The air pollutant filtration system according to claim 5, characterized in that: The pollutant retention unit includes a cooling mechanism and a retention bed, with the cooling mechanism positioned between the vacuum pump and the retention bed.

7. The air pollutant filtration system according to claim 6, characterized in that: The vacuum pump is also connected to an exhaust pipe. One end of the exhaust pipe is connected to the outlet of the vacuum pump, and the other end of the exhaust pipe is connected to the external environment. A second regeneration exhaust solenoid valve is installed on the exhaust pipe.

8. The air pollutant filtration system according to claim 1, characterized in that: The adsorption unit is connected to a measurement and control mechanism, which includes a measuring instrument and a controller. The measuring instrument can monitor the pollutant concentration at the outlet to determine whether the adsorption bed has failed. The outlet is equipped with an adsorption outlet solenoid valve. The measuring instrument, the adsorption bed, the adsorption regeneration unit, and the adsorption outlet solenoid valve are all communicatively connected to the controller.

9. The air pollutant filtration system according to claim 1, characterized in that: An adsorption air inlet solenoid valve is provided between the refrigeration unit and the adsorption bed, and the adsorption air inlet solenoid valve corresponds one-to-one with the adsorption bed.

10. A method for filtering air pollutants, characterized in that, The air pollutant filtration system according to any one of claims 1-9 includes the following steps: Ambient air is introduced into the refrigeration unit through the air inlet of the air intake unit. The refrigeration unit pre-cools the air. The pre-cooled air is then introduced into the adsorption bed of the adsorption unit. The adsorption bed adsorbs pollutants in the air. The adsorbed air is then discharged through the air outlet. When the adsorption bed fails, the adsorption regeneration unit is used to desorb the adsorption bed; the pollutant retention unit can retain the pollutants released by the adsorption regeneration unit.

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