Fresh air purification system

Abstract

The utility model relates to gas purification equipment technical field provides a kind of fresh air purification system, including adsorption-catalytic oxidation runner, monitoring device, acidic gas purifier and control device. Monitoring device is arranged between adsorption-catalytic oxidation runner and indoor air supply outlet. Acidic gas purifier is arranged between monitoring device and indoor air supply outlet. Control device is connected with monitoring device and acidic gas purifier. In the fresh air purification process, the gas discharged by laboratory is purified by adsorption-catalytic oxidation runner first, and after acidic gas content detection by monitoring device, acidic gas purifier is selected to start acidic gas purification and then discharged to indoor air supply outlet, or directly discharged to indoor air supply outlet. Through this fresh air purification system, it can ensure that the acidic gas content in the gas meets the standard before being discharged to indoor air supply outlet, and then effectively avoid the harm to human body caused by the harmful acidic gas exceeding the standard in the gas.

Description

Technical Field

[0001] This utility model relates to the field of gas purification equipment technology, and in particular to a fresh air purification system. Background Technology

[0002] With increasingly stringent laboratory safety and environmental standards, the treatment of volatile organic compounds (VOCs) and acidic gaseous pollutants has become a core issue in laboratory environmental control. Modern analytical testing laboratories and chemical synthesis laboratories continuously release benzene compounds, aldehydes and ketones (VOCs), and highly corrosive acidic gases such as hydrogen chloride, nitrogen oxides, and sulfides during operation. Current technologies commonly employ rotary gas purification systems, which treat polluted air through an adsorption-desorption cycle. However, in these systems, traditional rotary adsorption materials lack the selective adsorption capacity for low-concentration acidic gases, potentially allowing small-molecule acidic substances such as hydrogen sulfide and chlorine to penetrate the adsorption layer and enter the room, posing a health hazard. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a fresh air purification system.

[0004] This utility model provides a fresh air purification system, comprising: an adsorption-catalytic oxidation rotor; a monitoring device disposed between the adsorption-catalytic oxidation rotor and an indoor air outlet for monitoring the content of acidic gases; an acidic gas purifier disposed between the monitoring device and the indoor air outlet for purifying acidic gases; and a control device connected to the monitoring device and the acidic gas purifier for controlling the operating state of the acidic gas purifier based on the detection results of the monitoring device.

[0005] This utility model provides a fresh air purification system, wherein the adsorption-catalytic oxidation rotor includes: a rotor body, wherein the rotor body is provided with an adsorption zone and a desorption zone in sequence along the circumference, wherein an adsorbent and a catalytic oxidant are attached to both the adsorption zone and the desorption zone; and a driving device, wherein the driving device is connected to the rotor body and is used to drive the rotor body to rotate.

[0006] This utility model provides a fresh air purification system, including an exhaust pipe, one end of which is connected to the outlet of the adsorption zone, and the other end of which is connected to the monitoring device; and a regeneration unit, which is connected between the exhaust pipe and the desorption zone for desorption and regeneration of the desorption zone.

[0007] This utility model provides a fresh air purification system, wherein the regeneration unit includes: a regeneration pipeline, one end of which is connected to the exhaust pipeline and the other end of which is connected to the inlet of the desorption zone; a regeneration fan, which is connected to the regeneration pipeline; and a heater, which is connected to the regeneration pipeline and located between the regeneration fan and the inlet of the desorption zone.

[0008] The present invention provides a fresh air purification system, which further includes: a regenerated exhaust pipe, one end of which is connected to the outlet of the desorption zone, and the other end of which is laid outdoors; and a catalytic oxidizer connected to the regenerated exhaust pipe.

[0009] The present invention provides a fresh air purification system, which further includes: an exhaust pollutant detection device, which is installed in the regeneration exhaust pipe and is used to detect the concentration of gaseous pollutants in the regeneration exhaust pipe; and a control device connected to the exhaust pollutant detection device and the catalytic oxidizer, which is used to control the working state of the catalytic oxidizer based on the detection result of the exhaust pollutant detection device.

[0010] The present invention provides a fresh air purification system in which the area ratio of the adsorption zone to the desorption zone is 1:1.

[0011] The present invention provides a fresh air purification system, wherein the rotor body comprises: a cordierite honeycomb ceramic rotor; and the catalytic oxidant comprises: composite metal oxide nanoparticles.

[0012] The present invention provides a fresh air purification system, which further includes: an air inlet pipe connected to the inlet of the adsorption zone; and a main fan installed on the air inlet pipe.

[0013] The present invention provides a fresh air purification system, which further includes a pretreatment filter, wherein the pretreatment filter is disposed on the air intake pipe.

[0014] The fresh air purification system provided by this utility model includes an adsorption-catalytic oxidation rotor, a monitoring device, an acid gas purifier, and a control device. The monitoring device is installed between the adsorption-catalytic oxidation rotor and the indoor air outlet to detect the content of acid gas upstream of the indoor air outlet. The acid gas purifier is installed between the monitoring device and the indoor air outlet and is used to purify the acid gas. The control device is connected to the monitoring device and the acid gas purifier and is used to control the operating status of the acid gas purifier based on the detection results of the monitoring device.

[0015] In the fresh air purification process, the gas emitted from the laboratory is first purified by an adsorption-catalytic oxidation rotor. After the acid gas content is detected by a monitoring device, the acid gas purifier is activated to further purify the acid gas before it is discharged to the indoor air outlet, or it is directly discharged to the indoor air outlet. Specifically, when the monitoring device detects that the acid gas content exceeds the standard, the control device activates the acid gas purifier to purify the acid gas again until the acid gas content meets the standard before being discharged to the indoor air outlet. When the monitoring device detects that the acid gas content meets the standard, the control device shuts down the acid gas purifier, and the gas discharged from the adsorption-catalytic oxidation rotor is directly discharged to the indoor air outlet. This fresh air purification system ensures that the acid gas content in the gas meets the standard before being discharged to the indoor air outlet, thus effectively avoiding harm to the human body caused by excessive residual harmful acid gases in the gas. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a system schematic diagram of the fresh air purification system provided by this utility model.

[0018] Reference numerals: 100, rotor body; 110, adsorption zone; 120, desorption zone; 200, exhaust pipe; 300, regeneration pipe; 410, regeneration fan; 420, heater; 500, regeneration exhaust pipe; 600, catalytic oxidizer; 700, intake pipe; 810, main fan; 820, pretreatment filter; 910, monitoring device; 920, acid gas purifier. Detailed Implementation

[0019] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0020] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0022] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, to make the objectives, technical solutions, and advantages of the present invention clearer. The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, 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.

[0024] The following is combined Figure 1 This invention describes a fresh air purification system provided by an embodiment of the present invention. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute any particular limitation on the present invention.

[0025] An embodiment of this utility model provides a fresh air purification system, such as... Figure 1 As shown, the fresh air purification system includes: an adsorption-catalytic oxidation rotor; a monitoring device 910, which is located between the adsorption-catalytic oxidation rotor and the indoor air outlet for monitoring the content of acidic gases; an acidic gas purifier 920, which is located between the monitoring device 910 and the indoor air outlet for purifying acidic gases; and a control device, which is connected to the monitoring device 910 and the acidic gas purifier 920 for controlling the operating status of the acidic gas purifier 920 based on the detection results of the monitoring device 910.

[0026] In the fresh air purification process, the gas emitted from the laboratory is first purified by an adsorption-catalytic oxidation rotor. After the acid gas content is detected by the monitoring device 910, the acid gas purifier 920 is activated to further purify the acid gas before it is discharged to the indoor air outlet, or it is directly discharged to the indoor air outlet. Specifically, when the monitoring device 910 detects that the acid gas content exceeds the standard, the control device controls the acid gas purifier 920 to start, to purify the acid gas again until the acid gas content reaches the standard before being discharged to the indoor air outlet. When the monitoring device 910 detects that the acid gas content meets the standard, the control device controls the acid gas purifier 920 to stop, and the gas discharged from the adsorption-catalytic oxidation rotor is directly discharged to the indoor air outlet. Through this fresh air purification system, it is ensured that the acid gas content in the gas meets the standard before being discharged to the indoor air outlet, thereby effectively avoiding harm to the human body caused by excessive residual harmful acid gases in the gas.

[0027] For example, the acid gas purifier 920 is filled with an acid gas adsorbent, such as activated carbon, calcium hydroxide, zinc oxide, and copper oxide modified with amino or basic groups.

[0028] In one embodiment of the present invention, the adsorption-catalytic oxidation rotor includes: a rotor body 100, wherein an adsorption zone 110 and a desorption zone 120 are sequentially arranged along the circumference of the rotor body 100, and an adsorbent and a catalytic oxidant are attached to both the adsorption zone 110 and the desorption zone 120; and a driving device connected to the rotor body 100 for driving the rotor body 100 to rotate.

[0029] In actual operation, the adsorbent rotating into the adsorption zone 110 adsorbs particles in the exhaust gas, while the catalytic oxidant reacts with the exhaust gas to further purify it. The adsorbent and catalytic oxidant rotating into the desorption zone 120 undergo desorption and regeneration. This fresh air purification system eliminates the need for a separate catalytic oxidation unit, significantly reducing energy consumption for exhaust gas treatment. Furthermore, the catalytic oxidant rotates between the low-temperature adsorption zone 110 and the high-temperature desorption zone 120 with the rotor body 100, effectively reducing the occurrence of high-temperature sintering deactivation.

[0030] For example, in one embodiment of this invention, the area ratio of the adsorption region 110110 to the desorption region 120120 is 1:1. It should be noted that the above embodiment is merely an illustrative example of this invention and does not constitute any limitation on the invention. That is, the area ratio of the adsorption region 110 to the desorption region 120 can be adjusted according to actual needs.

[0031] In one embodiment of this invention, the rotor body 100 includes a cordierite honeycomb ceramic rotor. The catalytic oxidant includes composite metal oxide nanoparticles.

[0032] Alternatively, the rotor body 100 serves as the substrate layer of an adsorption-catalytic oxidation rotor, upon which adsorption and catalytic oxidation layers are coated and stacked. The adsorption layer is coated with a layer of ZSM-5, Y, Beta, activated carbon, or a mixture of these materials, with a thickness of 20-60 micrometers and an average pore size of 0.4-0.8 nanometers, preferentially adsorbing small-molecule VOCs. The catalytic oxidation layer is coated with composite metal oxide nanoparticles, such as Mn-Ce-Zr-O, Co3O4-LaFeO3, CuO-CeO2-TiO2, etc., with a particle size of 50-200 nm, uniformly coated onto the catalytic oxidation layer.

[0033] In one embodiment of this utility model, the monitoring device 910 includes, but is not limited to, a VOCs sensor, an SO2 electrochemical sensor, and an H2S photoionization sensor, with detection accuracies of ±0.01 mg / m³, ±0.001 mg / m³, and ±0.0005 mg / m³, respectively.

[0034] In one embodiment of the present invention, the fresh air purification system further includes: an exhaust pipe 200, one end of which is connected to the outlet of the adsorption zone 110, and the other end of which is connected to the monitoring device 910; and a regeneration unit, which is connected between the exhaust pipe 200 and the desorption zone 120 for desorption and regeneration of the desorption zone 120.

[0035] Furthermore, in one embodiment of the present invention, the regeneration unit includes: a regeneration pipeline 300, one end of which is connected to an exhaust pipeline 200, and the other end of which is connected to the inlet of the desorption zone 120; a regeneration fan 410, which is connected to the regeneration pipeline 300; and a heater 420, which is connected to the regeneration pipeline 300 and located between the regeneration fan 410 and the inlet of the desorption zone 120.

[0036] like Figure 1As shown, the outlet of the adsorption zone 110 of the rotor body 100 is connected to the exhaust pipe 200, which is connected to the monitoring device 910. The gas purified by the adsorption zone 110 of the rotor body 100 can be discharged through the exhaust pipe 200 into the monitoring device 910 for acid gas content detection. A regeneration pipe 300 is connected between the exhaust pipe 200 and the inlet of the desorption zone 120 of the rotor body 100. A regeneration fan 410 is installed on the regeneration pipe 300, and a heater 420 is installed between the regeneration fan 410 and the inlet of the desorption zone 120 of the rotor body 100. The heater 420 can heat the gas to 200°C to 300°C. During system operation, the regeneration fan 410 is turned on. The regeneration fan 410 can draw 5% to 10% of the gas in the exhaust pipe 200 into the heater 420. The high-temperature gas obtained after heating is transported to the desorption zone 120 of the rotor body 100 to realize the adsorption and catalytic purification and regeneration of the rotor body 100.

[0037] In one embodiment of the present invention, the fresh air purification system further includes: a regeneration exhaust pipe 500200, one end of which is connected to the outlet of the desorption zone 120, and the other end of which is laid to the outside; and a catalytic oxidizer 600, which is connected to the regeneration exhaust pipe 500200.

[0038] For example, such as Figure 1 As shown, a regeneration exhaust pipe 500200 is also connected to the outlet of the desorption zone 120 of the rotor body 100. The regeneration exhaust pipe 500200 can lead to the outside, and the gas that has completed the desorption process can be discharged to the outside through the regeneration exhaust pipe 500200. In particular, in order to ensure that the gas discharged to the outside meets the standards, a catalytic oxidizer 600 can be independently installed on the regeneration exhaust pipe 500200. When needed, the catalytic oxidizer 600 can be turned on to further purify the gas.

[0039] Specifically, in one embodiment of this utility model, the fresh air purification system further includes: an exhaust pollutant detection device, which is installed in the regeneration exhaust pipe 500200 to detect the concentration of gaseous pollutants in the regeneration exhaust pipe 500200; and a control device connected to the exhaust pollutant detection device and the catalytic oxidizer 600 to control the working state of the catalytic oxidizer 600 based on the detection result of the exhaust pollutant detection device.

[0040] When the concentration of gaseous pollutants is not higher than the preset value, the catalytic oxidizer 600 is started; when the concentration of gaseous pollutants is higher than the preset value, the catalytic oxidizer 600 is shut down. With this structural setting, the catalytic oxidizer 600 is only turned on when the gas quality does not meet the standard to further purify the gas, without the need for the catalytic oxidizer 600 to be started for a long time, which can greatly save gas treatment energy consumption.

[0041] In one embodiment of the present invention, the fresh air purification system further includes: an air inlet pipe 700, which is connected to the inlet of the adsorption zone 110; and a main fan 810, which is mounted on the air inlet pipe 700.

[0042] Furthermore, in one embodiment of this utility model, the fresh air purification system further includes a pretreatment filter 820, which is disposed on the air intake pipe 700.

[0043] Therefore, the exhaust gas in the room first enters the pretreatment filter 820 through the air intake pipe 700 for preliminary filtration, and then enters the adsorption-catalytic oxidation rotor for adsorption and catalytic oxidation purification, which can further improve the air purification effect.

[0044] In one embodiment of this invention, the rotor body 100 is made of cordierite honeycomb ceramic (400 mesh, 65% porosity), the adsorption layer is ZSM-5 molecular sieve (40 μm thickness, 0.5 nm pore size), and the catalytic oxidation layer is Mn-Ce-Zr-O nanoparticles (50 nm particle size, 5 g / L loading). The adsorbent in the acid gas purifier 920 is amino-modified activated carbon. Regeneration parameters: temperature 170℃, regeneration time 20 min, rotor speed 3 rph. Its toluene adsorption capacity is 1.8 g / 100 g molecular sieve, desorption efficiency is 99.2%, in-situ oxidation efficiency is 74%, regeneration energy consumption is 0.16 kW·h / m³, catalyst lifetime (after 3000 h) activity retention rate is 95%, VOCs outlet peak concentration is 2 mg / m³, and SO2 content meets the standard.

[0045] In one embodiment of this invention, the substrate layer is cordierite honeycomb ceramic (600 mesh, 70% porosity), the adsorption layer is a Y-type molecular sieve (60 μm thickness, 0.7 nm pore size), the catalytic oxidation layer is Co3O4-LaFeO3 nanoparticles (80 nm particle size, 5 g / L loading), and the adsorbent of the acid gas purifier 920 is amino-modified activated carbon. The regeneration parameters are: temperature 180℃, regeneration time 15 min, and rotor speed 2 rph. Its toluene adsorption capacity is 1.2 g / 100 g molecular sieve, desorption efficiency is 99.5%, in-situ oxidation efficiency is 78%, regeneration energy consumption is 0.20 kW·h / m³, catalyst lifetime (after 3000 h) activity retention rate is 95%, VOCs outlet peak concentration is 1.2 mg / m³, and SO2 content meets the standard.

[0046] In one embodiment of this invention, the substrate layer is cordierite honeycomb ceramic (200 mesh, 60% porosity), the adsorption layer is ZSM-5 / Y type mixed molecular sieve (thickness 50 μm, ZSM-5 pore size 0.5 nm, Y type pore size 0.7 nm), the catalytic oxidation layer is Mn-Ce-Zr-O nanoparticles (particle size 50 nm, loading 5 g / L), and the regeneration parameters are: temperature 150℃, regeneration time 25 min, rotor speed 2 rph. The adsorbent in the acid gas purifier 920 is amino-modified activated carbon. The toluene adsorption capacity is 2.1 g / 100 g molecular sieve, the desorption efficiency is 99.8%, the in-situ oxidation efficiency is 75%, the regeneration energy consumption is 0.14 kW·h / m³, the catalyst lifetime (after 3000 h) activity retention rate is 96%, the VOCs outlet peak concentration is 1.5 mg / m³, and the SO2 content meets the standard.

[0047] In another embodiment of this invention, the substrate layer is cordierite honeycomb ceramic (400 mesh, porosity 68%), the adsorption layer is coal-based activated carbon (specific surface area 800 m² / g), and the catalytic oxidation layer is CuO-CeO2-TiO2 nanoparticles (particle size 7 nm, loading 6 g / L). The regeneration parameters are: temperature 150℃, regeneration time 30 min, and rotor speed 1 rph. Its toluene adsorption capacity is 1.5 g / 100 g molecular sieve, desorption efficiency is 99.9%, in-situ oxidation efficiency is 82%, regeneration energy consumption is 0.12 kW·h / m³, catalyst lifetime (after 3000 h) activity retention rate is 97%, VOCs outlet peak concentration is 1 mg / m³, and SO2 content meets the standard.

[0048] Clearly, this fresh air purification system has a good gas purification effect.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fresh air purification system, characterized in that, include: Adsorption-catalytic oxidation rotor; A monitoring device (910) is disposed between the adsorption-catalytic oxidation rotor and the indoor air outlet for monitoring the content of acidic gas; An acid gas purifier (920) is provided between the monitoring device (910) and the indoor air outlet and is used to purify acid gases. A control device is connected to the monitoring device (910) and the acid gas purifier (920) for controlling the working state of the acid gas purifier (920) based on the detection results of the monitoring device (910).

2. The fresh air purification system according to claim 1, characterized in that, The adsorption-catalytic oxidation rotor includes: The rotor body (100) is provided with an adsorption zone (110) and a desorption zone (120) in sequence along the circumference. Adsorbent and catalytic oxidant are attached to both the adsorption zone (110) and the desorption zone (120). A driving device is connected to the rotating wheel body (100) and is used to drive the rotating wheel body (100) to rotate.

3. The fresh air purification system of claim 2, wherein, Also includes: An exhaust pipe (200) is provided, one end of which is connected to the outlet of the adsorption zone (110), and the other end of which is connected to the monitoring device (910). A regeneration unit is connected between the exhaust pipe (200) and the desorption zone (120) for desorption regeneration of the desorption zone (120).

4. The fresh air purification system of claim 3, wherein, The regeneration unit includes: A regeneration pipeline (300), one end of which is connected to the exhaust pipeline (200), and the other end of which is connected to the inlet of the desorption zone (120); A regeneration fan (410) is connected to the regeneration pipeline (300). A heater (420) is connected to the regeneration line (300) and is located between the regeneration fan (410) and the inlet of the desorption zone (120).

5. The fresh air purification system of claim 4, wherein, Also includes: A regenerated exhaust pipe (500) (200) is provided, one end of which is connected to the outlet of the desorption zone (120), and the other end of which is provided to the outside. A catalytic oxidizer (600) is connected to the regenerated exhaust line (500) (200).

6. The fresh air purification system according to claim 5, characterized in that, Also includes: A pollutant detection device is provided, which is installed in the regeneration exhaust pipe (500) (200) to detect the concentration of gaseous pollutants in the regeneration exhaust pipe (500) (200); The control device is connected to the pollutant discharge detection device and the catalytic oxidizer (600) and is used to control the working state of the catalytic oxidizer (600) based on the detection result of the pollutant discharge detection device.

7. The fresh air cleaning system according to any one of claims 2 to 6, characterized in that, The area ratio of the adsorption region (110) to the desorption region (120) is 1:

1.

8. The fresh air purification system of claim 7, wherein, The rotary wheel body (100) includes: Cordierite honeycomb ceramic rotor; The catalytic oxidant includes: Composite metal oxide nanoparticles.

9. The fresh air cleaning system of claim 8, wherein, Also includes: An air intake pipe (700) is connected to the inlet of the adsorption zone (110); The main fan (810) is installed on the air intake pipe (700).

10. The fresh air cleaning system of claim 9, wherein, Also includes: A pretreatment filter (820) is disposed on the intake duct (700).

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