Continuous renewable air purification device

Abstract

The utility model discloses a continuous renewable air purification device. The device is mainly used for removing CO2 in a closed environment and continuously purifying air. The device comprises a gas extraction unit, an adsorption unit, a regeneration unit, a filtering unit and a gas return unit. The gas extraction unit extracts gas containing CO2 from the hypoxia training chamber; the adsorption unit is composed of at least two adsorption tanks which are arranged in parallel, and CO2 in gas is adsorbed by using an adsorbent; the regeneration unit is used for regenerating the adsorbent through purging and analysis; the filtering unit is used for filtering particulate matters in the purified air, and the air returning unit is used for returning the clean air to the hypoxia training room. According to the device, through alternate work of the double adsorption tanks, continuity of air purification is achieved, it is guaranteed that air in a low-oxygen training room is continuously cleaned, and the CO2 concentration is effectively controlled. The device is compact in structure, efficient in operation and suitable for air purification in various closed low-oxygen environments.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to a continuous regenerative air purification device. Background Art

[0002] During hypoxic preparatory training, the trainees are in a relatively closed indoor environment. During their breathing process, they produce a large amount of CO2 and "waste gas", which makes the indoor air turbid, which is not conducive to long-term training for the personnel indoors. In order to keep the indoor CO2 content below 5000ppm, designers need to consider the control of CO2 content when making relevant designs. Traditional CO2 removal is mainly controlled by injecting fresh air into the system. However, due to the special nature of the hypoxic training room, it is impossible to directly inject fresh air from the outside, which is not conducive to maintaining the hypoxic gas indoors.

[0003] Therefore, the hypoxia training system adopts the form of CO2 adsorption. CO2 adsorption currently mainly adopts two methods: physical removal and chemical removal. The current chemical removal method is not suitable for large-scale promotion due to its high adsorption cost. During physical removal, a special adsorbent is used to complete the CO2 adsorption work. However, due to the saturation of adsorbent adsorption, in order to obtain a better adsorption effect, the volume of the adsorption tank is usually larger, thereby prolonging the adsorption time. Therefore, the volume of the entire equipment is usually larger. The most critical thing is that the entire adsorption process is discontinuous. When the adsorbent is saturated, the adsorption tower needs to be regenerated. At this time, the CO2 content in the training room shows intermittent high and low fluctuations.

[0004] Currently, no effective solution has been proposed to the problems that chemical adsorption in existing technologies is high in cost and unsuitable for large-scale application; physical adsorption requires regeneration of the adsorption tower after the adsorbent is saturated, and the adsorption process is usually intermittent and cannot be carried out continuously. Utility Model Content

[0005] The present invention provides a continuously regenerable air purification device in an embodiment to solve the problems in the prior art that chemical adsorption is high in cost and is not suitable for large-scale application; physical adsorption requires regeneration of the adsorption tower after the adsorbent is saturated, the adsorption process is usually intermittent, and purification cannot be carried out continuously.

[0006] To achieve the above-mentioned objectives, the present invention provides a continuously regenerable air purification device, which includes: a gas extraction unit for extracting gas containing CO2 from a hypoxic training room; an adsorption unit comprising at least two adsorption tanks arranged in parallel, each of which is filled with an adsorbent, and is used to select at least one adsorption tank through a pneumatic valve to adsorb CO2 in the gas; a regeneration unit for purging and analyzing the adsorbent that has adsorbed CO2 to remove CO2 in the adsorption tank and regenerate the adsorbent; and a gas return unit for returning the gas after adsorption to the hypoxic training room.

[0007] Optionally, it also includes: a filtering unit; the input end of the filtering unit is connected to the output end of the regeneration unit, and the output end of the filtering unit is connected to the input end of the gas return unit, for filtering particulate matter in the gas after adsorption.

[0008] Optionally, each adsorption tank of the adsorption unit is controlled by multiple pneumatic valves; the pneumatic valves include a first pneumatic valve for controlling air intake, a second pneumatic valve for controlling purge, a third pneumatic valve for controlling exhaust, and a fourth pneumatic valve for gas return.

[0009] Optionally, the number of the first pneumatic valves corresponds one-to-one to the number of the adsorption tanks; the number of the second pneumatic valves corresponds one-to-one to the number of the adsorption tanks; the number of the third pneumatic valves corresponds one-to-one to the number of the adsorption tanks; and the number of the fourth pneumatic valves corresponds one-to-one to the number of the adsorption tanks.

[0010] Optionally, the regeneration unit includes: an adsorption tower purge fan and an adsorption tower desorption fan, the adsorption tower purge fan is connected to each of the adsorption tanks, and is used to supply fresh air into the adsorption tank; the adsorption tower desorption fan is connected to each of the adsorption tanks, and is used to extract CO2 gas from the adsorption tank.

[0011] Optionally, the gas extraction unit includes: an evolved gas air inlet blower; the input end of the evolved gas air inlet blower is connected to the hypoxia training room, and the output end is connected to each of the adsorption tanks.

[0012] Optionally, the filtration unit is a filter with a filtration accuracy of less than 0.01 microns; the input end of the filter is connected to each of the adsorption tanks.

[0013] Optionally, the gas return unit includes: an evolved gas outlet blower; the input end of the evolved gas outlet blower is connected to the output end of the filter, and the output end is connected to the hypoxia training chamber.

[0014] Optionally, it further includes: a compressed air source; the compressed air source is connected to each of the pneumatic valves to supply air to each of the pneumatic valves.

[0015] Beneficial effects of the utility model:

[0016] This utility model provides a continuous regenerative air purification device. By alternating the operation of two adsorption tanks, the device achieves continuity in the air purification process. At the same time, the adsorbent is regenerated through purge and desorption functions, extending the service life of the device. This solves the problems of discontinuous CO2 removal, large adsorption tank size, and high operating costs in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a continuous regenerative air purification device provided by an embodiment of the present utility model.

[0018] Explanation of symbols:

[0019] Evolved gas inlet fan-1, adsorption tank A-2, adsorption tank B-3, adsorption tower purge fan-4, adsorption tower analysis fan-5, filter-6, evolved gas outlet fan-7, pneumatic valves 1-8, pneumatic valves 2-9, pneumatic valves 3-10, pneumatic valves 4-11, pneumatic valves 5-12, pneumatic valves 6-13, pneumatic valves 7-14, pneumatic valves 8-15, hypoxia training room-16. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] The utility model relates to a continuous regenerative air purification device for a hypoxic training room, which is particularly suitable for CO2 removal and air purification in a closed environment. Figure 1 This is a schematic diagram of the structure of a continuous regenerative air purification device provided by an embodiment of the present utility model. Figure 1 As shown, the device includes:

[0022] 1. Gas extraction unit, used to extract gas containing CO2 from the hypoxic training room;

[0023] The gas extraction unit includes an evolved gas inlet blower. The inlet end of the evolved gas inlet blower is connected to the hypoxic training room and is used to extract gas containing CO2 from the hypoxic training room. This gas extraction unit ensures that air in the closed environment (hypoxic training room) continuously enters the purification device. The air pressure of the evolved gas inlet blower is set at 15kPa, which can effectively ensure gas flow and purification efficiency.

[0024] 2. An adsorption unit, comprising at least two adsorption tanks arranged in parallel, each of which is filled with an adsorbent, and is used to select at least one adsorption tank through a pneumatic valve to adsorb CO2 in the gas;

[0025] The adsorption unit is the core of the entire air purification system, consisting of at least two parallel adsorption tanks: tank A and tank B. Each tank is filled with an adsorbent (specifically, a CO2 adsorbent) that removes CO2 from the gas through physical adsorption. Both tanks A and B are controlled by multiple pneumatic valves to perform various functions: adsorption, purging, desorption, and gas return.

[0026] 3. Regeneration unit, used to purge and analyze the adsorbent that has adsorbed CO2 to remove CO2 in the adsorption tank and regenerate the adsorbent;

[0027] The regeneration unit primarily comprises an adsorption tower purge blower and an adsorption tower desorption blower, which are used to regenerate the adsorbent in the adsorption tanks. The purge blower is connected to each adsorption tank to introduce fresh air, while the desorption blower is connected to each adsorption tank to extract CO2 gas from the tank. When the adsorbent reaches saturation with CO2, fresh air is blown through the tank, and the desorption blower desorbs the CO2 from the adsorbent, allowing the adsorbent to be used again.

[0028] 4. Gas return unit, used to return the adsorbed gas to the hypoxia training room.

[0029] The gas return unit includes a degassing blower. This blower returns the adsorbed gas, i.e., the CO2-free gas, back to the hypoxic training room. The CO2 concentration in the returned gas is below a set safety threshold, thereby ensuring air quality within the hypoxic training room and preventing the adverse health effects of excessive CO2 concentrations on trainees.

[0030] 5. Filter unit;

[0031] The input end of the filter unit is connected to the output end of the regeneration unit, and the output end of the filter unit is connected to the input end of the gas return unit, for filtering particulate matter from the gas after adsorption.

[0032] The filtration unit is connected between the regeneration unit and the gas return unit. Its function is to filter particulate matter from the gas discharged from the adsorption tank, that is, the gas after adsorption, ensuring that the gas returned to the hypoxia training room is clean and free of impurities. The filtration unit uses a filter with a filtration accuracy of less than 0.01 microns, which can effectively remove fine particulate matter from the air.

[0033] The adsorption unit includes at least two adsorption tanks arranged in parallel. In a specific embodiment, the adsorption unit includes two adsorption tanks working in parallel, namely adsorption tank A and adsorption tank B. Each adsorption tank is independently controlled by multiple pneumatic valves, including the following pneumatic valves:

[0034] The first pneumatic valve: controls the air intake. When the gas extraction unit (evolving gas intake fan) sends the gas from the hypoxia training room into the adsorption unit, the first pneumatic valve opens, allowing the gas to enter the adsorption tank for CO2 adsorption.

[0035] The second pneumatic valve is used to control the purge. When the adsorbent in the adsorption tank is saturated, the system will close the first pneumatic valve and open the second pneumatic valve to send fresh air into the adsorption tank through the adsorption tower purge fan for purge.

[0036] The third pneumatic valve is used to control the exhaust operation of the adsorption tower analysis fan. In order to ensure the thorough analysis of the adsorbent in the adsorption tank, the adsorption tower analysis fan is used to exhaust air into the adsorption tank to increase the pressure difference in the adsorption tank, so as to promote the separation of CO2 and other gases from the adsorbent as soon as possible and then discharge them to the outside.

[0037] The fourth pneumatic valve is used to control the gas return, and send the air purified by the adsorption tank back to the hypoxia training room through the gas return unit, i.e. the gas outlet fan.

[0038] Furthermore, the number of the first pneumatic valves corresponds one-to-one to the number of the adsorption tanks; the number of the second pneumatic valves corresponds one-to-one to the number of the adsorption tanks; the number of the third pneumatic valves corresponds one-to-one to the number of the adsorption tanks; and the number of the fourth pneumatic valves corresponds one-to-one to the number of the adsorption tanks.

[0039] When the adsorption units are adsorption tanks A and B, the first pneumatic valve includes: pneumatic valve 1 and pneumatic valve 2; the second pneumatic valve includes: pneumatic valve 3 and pneumatic valve 4; the third pneumatic valve includes: pneumatic valve 5 and pneumatic valve 6; the fourth pneumatic valve includes: pneumatic valve 7 and pneumatic valve 8.

[0040] The specific connection relationship is:

[0041] The output end of the hypoxic training room is connected to the evolving gas inlet fan, the evolving gas inlet fan is connected to the adsorption tank A through pneumatic valve 1, and the evolving gas inlet fan is connected to the adsorption tank B through pneumatic valve 2; the adsorption tower purge fan is connected to the adsorption tank A through pneumatic valve 3, and the adsorption tower purge fan is connected to the adsorption tank B through pneumatic valve 4; the adsorption tower decomposition fan is connected to the adsorption tank A through pneumatic valve 5, and the adsorption tower decomposition fan is connected to the adsorption tank B through pneumatic valve 6; the filter is connected to the adsorption tank A through pneumatic valve 7, and the filter is connected to the adsorption tank B through pneumatic valve 8. The output end of the filter is connected to the input end of the evolving gas outlet fan, and the output end of the evolving gas outlet fan is connected to the input end of the hypoxic training room.

[0042] The adsorption unit works as follows: Under normal operating conditions, tank A absorbs CO2, capturing it in the air with the adsorbent and directing the purified air into the filtration unit. Meanwhile, tank B enters a regeneration phase, powered by the adsorption tower's purge blower and the adsorption tower's desorption blower. When the adsorbent in tank A reaches saturation, the system automatically switches to tank B to continue adsorption, while tank A enters the regeneration process. This alternating operation ensures the continuity of the air purification process and avoids fluctuations in air quality.

[0043] The present application is described below through a specific embodiment:

[0044] While adsorption tank A is adsorbing gas through pneumatic valve 1, adsorption tank B is regenerating through pneumatic valves 4 and 6. Specifically, the adsorption tower purge blower delivers fresh air to adsorption tank B through pneumatic valve 4. Furthermore, to ensure thorough desorption of the adsorbent in adsorption tank B, the adsorption tower desorption blower draws air into adsorption tank B through pneumatic valve 6, increasing the pressure differential within adsorption tank B and prompting gases like CO2 to separate from the adsorbent as quickly as possible for discharge. When the adsorbent in adsorption tank A reaches saturation, the system automatically switches to adsorption tank B to continue the adsorption operation. That is, adsorption tank B is adsorbing gas through pneumatic valve 2, while adsorption tank A is regenerating through pneumatic valves 3 and 5.

[0045] The regeneration unit is used to restore the adsorption capacity of the adsorbent in the adsorption tank, which is mainly achieved through the adsorption tower purge fan and the adsorption tower desorption fan. The specific steps are as follows:

[0046] The adsorbent in the adsorption tank will gradually become saturated during the CO2 adsorption process. After saturation, the adsorbent will lose its ability to continue adsorption. At this time, the adsorption tower purge fan starts, sending fresh air into the adsorption tank through the second pneumatic valve, blowing the residual CO2 out of the adsorbent.

[0047] After the purge process is completed, the adsorption tower desorption blower starts, increasing the pressure difference in the adsorption tank through the third pneumatic valve, accelerating the CO2 desorption process. The CO2 is quickly drawn out of the adsorption tank and discharged into the external environment.

[0048] After the desorption is completed, the adsorption capacity of the adsorbent is restored and can be used for CO2 adsorption again.

[0049] The filter unit, located between the regeneration unit and the gas return unit, is responsible for filtering particulate matter from the purified air. Due to the unique environment of the hypoxic training room, the air must be free of large particulate matter impurities. Air quality is crucial to personnel health, especially during long training sessions. The filter unit has a filtration accuracy of less than 0.01 microns, effectively filtering out dust, fine particles, and other impurities from the air, ensuring the purity of the gas.

[0050] The filtered air is transported to the gas return unit, where the exhaust fan returns the clean air to the hypoxic training room to ensure the cleanliness of the indoor air and the appropriate CO2 concentration.

[0051] In an optional embodiment, a continuously regenerable air purification device further includes: a compressed air source; the compressed air source is connected to each of the pneumatic valves for supplying air to each of the pneumatic valves.

[0052] The proper operation of the pneumatic valves in this system relies on a compressed air source. This compressed air source is connected to each pneumatic valve via piping, ensuring that each valve accurately executes commands during the adsorption, purge, desorption, and gas return processes. Because the pneumatic valves throughout the system must operate efficiently and accurately, the stability and reliability of the air source are directly related to the efficiency of the air purification system.

[0053] The specific implementation process of the utility model is described below:

[0054] S1. Extract gas containing CO2 from the hypoxic training room;

[0055] First, the gas extraction unit extracts gas containing CO2 from the hypoxia training room through the gas inlet fan. The extracted gas enters the adsorption unit through a pipeline for treatment.

[0056] S2, passing the gas through at least two adsorption tanks arranged in parallel, wherein at least one adsorption tank is used to adsorb CO2 in the gas;

[0057] After entering the adsorption unit, the gas passes through the first pneumatic valve into adsorption tank A or adsorption tank B. The adsorbent begins to absorb the CO2 in the gas, and the purified gas passes through the fourth pneumatic valve into the filtration unit. During the adsorption process, the adsorbent gradually becomes saturated. When the adsorbent is saturated, the adsorption tank stops adsorption and enters the regeneration phase.

[0058] S3, purging and analyzing the adsorption tank that has adsorbed CO2 to remove the CO2 in the adsorption tank to regenerate the adsorbent;

[0059] Once the adsorbent is saturated, the adsorption unit switches to regeneration mode via the second and third pneumatic valves. The adsorption tower purge blower activates, sending fresh air into the adsorption tank through the second pneumatic valve to remove any remaining CO2. The adsorption tower desorption blower then activates, increasing the pressure differential within the adsorption tank via the third pneumatic valve, accelerating CO2 desorption and discharge. After regeneration is complete, the adsorption tank can resume its adsorption mode.

[0060] S4. Filter the gas discharged from the adsorption tank to remove particulate matter;

[0061] After being purified by the adsorption tank, the air enters the filtration unit, where the filter effectively removes tiny particles in the air. The filtered gas meets the air quality standards for hypoxic training rooms.

[0062] S5. Return the filtered gas to the hypoxia training room.

[0063] The filtered air is sent back to the hypoxic training room through the exhaust fan to keep the air clean and the CO2 concentration low in the training room.

[0064] This utility model's continuously regenerating air purification device can consistently maintain CO2 concentrations within a safe range (i.e., below 5000 ppm) in hypoxic training rooms, while also ensuring clean, particulate-free air. The device achieves continuous air purification through the alternating operation of dual adsorption tanks. Furthermore, the adsorbent regeneration process effectively extends the device's service life and reduces operating costs.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A continuously regenerable air purification device, characterized in that: include: A gas extraction unit, used for extracting gas containing CO2 from the hypoxic training chamber; An adsorption unit comprising at least two adsorption tanks arranged in parallel, each of which is filled with an adsorbent, and is used to select at least one adsorption tank through a pneumatic valve to adsorb CO2 in the gas; The regeneration unit is used to purge and analyze the adsorbent that has adsorbed CO2 to remove CO2 from the adsorption tank and regenerate the adsorbent; The gas return unit is used to return the gas after adsorption to the hypoxia training room.

2. The device according to claim 1, characterized in that Also includes: Filtration unit; The input end of the filter unit is connected to the output end of the regeneration unit, and the output end of the filter unit is connected to the input end of the gas return unit, for filtering particulate matter from the gas after adsorption.

3. The device according to claim 1, characterized in that: Each adsorption tank of the adsorption unit is controlled by a plurality of pneumatic valves; The pneumatic valves include a first pneumatic valve for controlling air intake, a second pneumatic valve for controlling purge, a third pneumatic valve for controlling air extraction, and a fourth pneumatic valve for gas return.

4. The device according to claim 3, characterized in that: The number of the first pneumatic valves corresponds to the number of the adsorption tanks; The number of the second pneumatic valves corresponds one to one to the number of the adsorption tanks; The number of the third pneumatic valves corresponds to the number of the adsorption tanks; The number of the fourth pneumatic valves corresponds to the number of the adsorption tanks.

5. The device according to claim 1, characterized in that: The regeneration unit includes: an adsorption tower purge fan and an adsorption tower desorption fan. The adsorption tower purge fan is connected to each of the adsorption tanks for supplying fresh air into the adsorption tanks; the adsorption tower desorption fan is connected to each of the adsorption tanks for extracting CO2 gas from the adsorption tanks.

6. The device according to claim 1, characterized in that: The gas extraction unit includes: an evolved gas air inlet blower; the input end of the evolved gas air inlet blower is connected to the hypoxia training room, and the output end is connected to each of the adsorption tanks.

7. The device according to claim 2, characterized in that: The filtration unit is a filter with a filtration accuracy of less than 0.01 microns; the input end of the filter is connected to each of the adsorption tanks.

8. The device according to claim 7, characterized in that: The gas return unit includes: an evolved gas outlet blower; an input end of the evolved gas outlet blower is connected to an output end of the filter, and an output end is connected to the hypoxia training chamber.

9. The device according to claim 3, characterized in that Also includes: Compressed air source; The compressed air source is connected to each of the pneumatic valves for supplying air to each of the pneumatic valves.

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