Photocatalytic reaction device

Abstract

The utility model provides a light-catalyzed reaction device which comprises a reaction chamber, a light-catalyzed reaction chamber and a light-catalyzed reaction chamber, wherein the reaction chamber is provided with a gas inlet for introducing formaldehyde-containing gas; the test plate is arranged in the reaction chamber, and the test plate is coated with a solid catalyst; the light source is arranged in the reaction chamber and faces the test plate; the exhaust pipe is communicated with the cavity of the reaction chamber, and the exhaust pipe and the gas inlet are respectively positioned on two sides of the test plate; and the concentration detector is arranged on the exhaust pipe and is used for detecting and displaying the formaldehyde concentration after the reaction of the formaldehyde-containing gas. In the scheme, the formaldehyde-containing gas with known formaldehyde concentration is introduced into the reaction chamber, after the reaction chamber is filled with the formaldehyde-containing gas, the light-catalyzed reaction is carried out through the irradiation of the light source and the solid catalyst on the test plate, and the formaldehyde concentration after the reaction of the formaldehyde-containing gas can be detected and displayed in real time through the concentration detector connected to the exhaust pipe. Therefore, the reaction effect can be timely obtained. By adopting the scheme, the operation is simplified, and the convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde gas photocatalytic reaction, in particular to a photocatalytic reaction device. Background Art

[0002] Photocatalytic reaction is a series of oxidation-reduction reactions using sunlight and other light sources under the action of photocatalysts, which can completely oxidize organic matter into non-toxic and harmless substances without generating secondary pollution. In addition, photocatalysts are not consumed during the reaction process. From an energy perspective, this feature makes photocatalytic technology more promising.

[0003] When conducting a photocatalytic reaction test on formaldehyde-containing gas, a photocatalytic reaction device is used. After a period of reaction, the exhausted gas is sampled, and then a separate detection device is used to detect the sample to obtain the formaldehyde concentration in the gas after the reaction. This method requires multiple sampling during the test, which is cumbersome and affects convenience. Utility Model Content

[0004] The utility model provides a photocatalytic reaction device to solve the problem that the photocatalytic reaction device in the prior art is inconvenient to use.

[0005] In order to solve the above problems, the utility model provides a photocatalytic reaction device, comprising: a reaction chamber, the reaction chamber having a gas inlet for introducing formaldehyde-containing gas; a test plate, arranged in the reaction chamber, and coated with a solid catalyst; a light source, arranged in the reaction chamber, and the light source faces the test plate; an exhaust pipe, connected to the cavity of the reaction chamber, the exhaust pipe and the gas inlet are respectively located on both sides of the test plate; a concentration detector, arranged on the exhaust pipe, and the concentration detector is used to detect and display the formaldehyde concentration after the formaldehyde-containing gas reacts.

[0006] Furthermore, the photocatalytic reaction device further comprises a limiting structure, wherein the limiting structure is used to limit the test plate, and the position of the limiting structure is adjustable to adjust the position of the test plate in the reaction chamber.

[0007] Furthermore, the limiting structure includes two limiting claws, which are respectively arranged on the top wall and the bottom wall of the reaction chamber, and are used to clamp the test board; the limiting claws are retractable in the height direction to adjust the position of the test board in the height direction.

[0008] Furthermore, the top wall and the bottom wall of the reaction chamber are respectively provided with slide grooves, the extension direction of the slide grooves is the direction of the light source, and the two limit claws are respectively slidably matched with the two slide grooves to adjust the distance between the test plate and the light source.

[0009] Furthermore, a joint is provided on the inner wall of the reaction chamber, the joint has an internal thread, and the light sources are multiple with different powers, and each of the light sources is detachably connected to the joint.

[0010] Furthermore, the photocatalytic reaction device also includes a temperature sensor and a humidity sensor. The temperature sensor is used to detect the temperature in the reaction chamber, and the humidity sensor is used to detect the humidity in the reaction chamber.

[0011] Furthermore, the photocatalytic reaction device also includes a filter, which is arranged in the exhaust pipe and located between the reaction chamber and the concentration detector.

[0012] Furthermore, the photocatalytic reaction device also includes a fan, and the fan is arranged in the reaction chamber.

[0013] Furthermore, the photocatalytic reaction device also includes a humidifier, and the humidifier is arranged in the reaction chamber.

[0014] Furthermore, a cooling channel is provided on the inner wall of the reaction chamber, and the cooling channel is used to circulate cooling water to cool the cavity of the reaction chamber.

[0015] The technical solution of the utility model is applied to provide a photocatalytic reaction device, including: a reaction chamber, the reaction chamber having a gas inlet for introducing formaldehyde-containing gas; a test plate, arranged in the reaction chamber, and coated with a solid catalyst on the test plate; a light source, arranged in the reaction chamber, and the light source faces the test plate; an exhaust pipe, connected to the cavity of the reaction chamber, and the exhaust pipe and the gas inlet are respectively located on both sides of the test plate; a concentration detector, arranged on the exhaust pipe, and the concentration detector is used to detect and display the formaldehyde concentration after the formaldehyde-containing gas reacts. In this solution, the reaction chamber is introduced with formaldehyde-containing gas with a known formaldehyde concentration. After the formaldehyde-containing gas fills the reaction chamber, a photocatalytic reaction is carried out through the irradiation of the light source and the solid catalyst on the test plate. Through the concentration detector connected to the exhaust pipe, the formaldehyde concentration after the formaldehyde-containing gas reacts can be detected and displayed in real time, so as to timely know the reaction effect. With this solution, there is no need to sample and detect the gas after the reaction separately, which simplifies the operation and improves the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The schematic diagram of the structure of the photocatalytic reaction device provided in the embodiment of the utility model is shown.

[0018] The above drawings include the following reference numerals:

[0019] 10. Reaction chamber;

[0020] 11. Gas inlet;

[0021] 12. Cooling channel;

[0022] 20. Test board;

[0023] 30. Light source;

[0024] 41. Exhaust pipe;

[0025] 42. Filter;

[0026] 50. Concentration detector;

[0027] 60. Limiting structure;

[0028] 61. Limiting claw;

[0029] 71. Temperature sensor;

[0030] 72. Humidity sensor;

[0031] 73. Fan;

[0032] 74. Humidifier. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] like Figure 1 As shown, an embodiment of the utility model provides a photocatalytic reaction device, including: a reaction chamber 10, the reaction chamber 10 having a gas inlet 11 for introducing formaldehyde-containing gas; a test plate 20, arranged in the reaction chamber 10, and coated with a solid catalyst; a light source 30, arranged in the reaction chamber 10, and the light source 30 faces the test plate 20; an exhaust pipe 41, which is connected to the cavity of the reaction chamber 10, and the exhaust pipe 41 and the gas inlet 11 are respectively located on both sides of the test plate 20; a concentration detector 50, which is arranged on the exhaust pipe 41, and the concentration detector 50 is used to detect and display the formaldehyde concentration after the formaldehyde-containing gas reacts.

[0035] In this solution, the reaction chamber 10 is introduced with a formaldehyde-containing gas with a known formaldehyde concentration. After the formaldehyde-containing gas fills the cavity of the reaction chamber 10, a photocatalytic reaction is carried out through the irradiation of the light source 30 and the solid catalyst on the test plate 20. The concentration detector 50 connected to the exhaust pipe 41 can detect and display the formaldehyde concentration of the formaldehyde-containing gas after the reaction in real time, so as to know the reaction effect in time. With this solution, there is no need to sample and detect the gas after the reaction separately, which simplifies the operation and improves the convenience.

[0036] The test board 20 is a ventilated mesh metal structure.

[0037] In this solution, the photocatalytic reaction device further includes a limiting structure 60 , which is used to limit the test plate 20 . The position of the limiting structure 60 is adjustable to adjust the position of the test plate 20 in the reaction chamber 10 .

[0038] In this way, the test plate 20 is installed, and the position of the test plate 20 in the reaction chamber 10 can be adjusted according to the use requirements, so that the device has high versatility.

[0039] Specifically, the limiting structure 60 includes two limiting claws 61, which are respectively arranged on the top wall and the bottom wall of the reaction chamber 10, and the two limiting claws 61 are used to clamp the test board 20; the limiting claws 61 are retractable in the height direction to adjust the position of the test board 20 in the height direction.

[0040] When the two limit clamps 61 are moved away from each other, the test board 20 can be loosened, thereby the test board 20 can be removed, and when the two limit clamps 61 are moved closer to each other, the test board 20 can be clamped, thereby fixing the test board 20. In addition, by adjusting the telescopic length of the limit clamps 61 in the height direction, the position of the test board 20 in the height direction can be adjusted.

[0041] Specifically, a rotatable nut structure is provided on the reaction chamber 10, and the limiting claw 61 has a screw rod, which is threadedly connected to the nut structure, and a limiting groove extending along the length direction is provided on the screw rod, and a limiting block is provided on the reaction chamber 10, and the limiting block extends into the limiting groove, thereby limiting the circumferential position of the screw rod. During operation, the nut structure is rotated, and the screw rod is driven to move axially, thereby realizing the extension and retraction of the limiting claw 61.

[0042] Furthermore, the top wall and the bottom wall of the reaction chamber 10 are respectively provided with slide grooves, the extension direction of the slide grooves is the direction of the light source 30, and the two limit claws 61 are respectively slidably matched with the two slide grooves to adjust the distance between the test board 20 and the light source 30. This method has a simple structure and is easy to adjust the position of the limit claws 61.

[0043] Specifically, the photocatalytic reaction device further includes a slide seat, the nut structure is installed on the slide seat, and the slide seat and the slide groove are slidably matched to achieve the sliding match between the limit claw 61 and the slide groove. The matching position of the slide groove and the slide seat is sealed, that is, the cavity of the reaction chamber 10 is a closed cavity to avoid leakage.

[0044] In this solution, a joint is provided on the inner wall of the reaction chamber 10, the joint has an internal thread, and the light source 30 is a plurality of light sources with different powers, and each light source 30 is detachably connected to the joint. In this way, light sources 30 of different models and powers can be installed on the joint to meet the test requirements.

[0045] like Figure 1 As shown, the photocatalytic reaction device further includes a temperature sensor 71 and a humidity sensor 72. The temperature sensor 71 is used to detect the temperature in the reaction chamber 10, and the humidity sensor 72 is used to detect the humidity in the reaction chamber 10. In this way, the temperature and humidity in the reaction chamber 10 can be known in time, and when the temperature and humidity are not suitable, they need to be adjusted to meet the test requirements.

[0046] Furthermore, the photocatalytic reaction device further includes a filter 42, which is disposed in the exhaust pipe 41 and between the reaction chamber 10 and the concentration detector 50. The filter 42 can filter out particulate impurities to prevent the impurities from entering the concentration detector 50 and affecting the normal use of the concentration detector 50.

[0047] In this embodiment, the photocatalytic reaction device further includes a fan 73, which is disposed in the reaction chamber 10. The fan 73 allows the gas in the reaction chamber 10 to flow fully, thereby contacting the solid catalyst on the test plate 20, so that the formaldehyde-containing gas fully reacts.

[0048] In this solution, the photocatalytic reaction device further includes a humidifier 74, which is disposed in the reaction chamber 10. The humidifier 74 is used to humidify the cavity in the reaction chamber 10 to ensure a suitable humidity.

[0049] Furthermore, the inner wall of the reaction chamber 10 is provided with a cooling channel 12, and the cooling channel 12 is used to circulate cooling water to cool the cavity of the reaction chamber 10. The reaction chamber 10 can be cooled by the cooling water to avoid the temperature rise caused by the irradiation of the light source 30, and ensure that the reaction chamber 10 has a suitable temperature.

[0050] Furthermore, the photocatalytic reaction device also includes an openable and closable circulation pipeline, one end of which is connected to the concentration detector 50, and the other end of which is connected to the cavity in the reaction chamber 10. When the circulation pipeline and the fan 73 are turned on, the gas in the reaction chamber 10 can be transported back to the reaction chamber 10 through the circulation pipeline after being output to react again, so as to ensure sufficient reaction.

[0051] Furthermore, the photocatalytic reaction device also includes an exhaust gas treatment device, and the gas discharged after passing through the concentration detector 50 enters the exhaust gas treatment device to treat harmful gases.

[0052] This device is realized by the following methods:

[0053] Step 1: This device uses circulating water to reduce the temperature rise caused by light source irradiation to maintain the constant temperature of the device and reaction.

[0054] Step 2: This device uses a gas source such as a steel cylinder with a known formaldehyde gas concentration as a gas generator, and the gas enters the container through the gas inlet.

[0055] Step 3, this device uses a replaceable threaded light source, which is convenient for replacing light sources of different powers, models, etc.

[0056] Step 4: Built-in temperature and humidity sensors and a humidifier to adjust the temperature and humidity inside the device.

[0057] Step 5: Place a small fan at the bottom of the device. The fan rotates during operation to ensure uniformity of gas in the device.

[0058] Step 6: Apply a certain amount of solid catalyst sample onto a test plate, which is a breathable mesh metal structure.

[0059] Step 7: Use a structure that can be raised and lowered and adjusted left and right to fix the test board, with the front of the test board facing the light source.

[0060] Step 8: The formaldehyde gas detector uses a pump-suction digital display detector with a pre-filter to prevent the solid catalyst on the test plate from falling off and entering the detector.

[0061] In this solution, the reaction chamber 10 is introduced with a formaldehyde-containing gas with a known formaldehyde concentration. After the formaldehyde-containing gas fills the cavity of the reaction chamber 10, a photocatalytic reaction is carried out through the irradiation of the light source 30 and the solid catalyst on the test plate 20. The concentration detector 50 connected to the exhaust pipe 41 can detect and display the formaldehyde concentration of the formaldehyde-containing gas after the reaction in real time, so as to know the reaction effect in time. With this solution, there is no need to sample and detect the gas after the reaction separately, which simplifies the operation and improves the convenience.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0065] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0067] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

Claims

1. A photocatalytic reaction device, characterized in that: include: A reaction chamber (10), wherein the reaction chamber (10) has a gas inlet (11) for introducing a formaldehyde-containing gas; A test plate (20) is arranged in the reaction chamber (10), and a solid catalyst is coated on the test plate (20); a light source (30), disposed in the reaction chamber (10), the light source (30) facing the test plate (20); An exhaust pipe (41) is connected to the cavity of the reaction chamber (10), and the exhaust pipe (41) and the gas inlet (11) are respectively located on two sides of the test plate (20); A concentration detector (50) is arranged on the exhaust pipe (41), and the concentration detector (50) is used to detect and display the formaldehyde concentration of the formaldehyde-containing gas after the reaction.

2. The photocatalytic reaction device according to claim 1, characterized in that: The photocatalytic reaction device further comprises a limiting structure (60), wherein the limiting structure (60) is used to limit the position of the test plate (20), and the position of the limiting structure (60) is adjustable to adjust the position of the test plate (20) in the reaction chamber (10).

3. The photocatalytic reaction device according to claim 2, characterized in that: The limiting structure (60) comprises two limiting claws (61), the two limiting claws (61) are respectively arranged on the top wall and the bottom wall of the reaction chamber (10), and the two limiting claws (61) are used to clamp the test board (20); the limiting claws (61) are retractable in the height direction to adjust the position of the test board (20) in the height direction.

4. The photocatalytic reaction device according to claim 3, characterized in that: The top wall and the bottom wall of the reaction chamber (10) are respectively provided with slide grooves, the extension direction of the slide grooves is the direction of the light source (30), and the two limit claws (61) are respectively slidably matched with the two slide grooves to adjust the distance between the test plate (20) and the light source (30).

5. The photocatalytic reaction device according to claim 1, characterized in that: A joint is provided on the inner wall of the reaction chamber (10), the joint having an internal thread, and the light sources (30) are multiple and have different powers, and each of the light sources (30) is detachably connected to the joint.

6. The photocatalytic reaction device according to claim 1, characterized in that: The photocatalytic reaction device further comprises a temperature sensor (71) and a humidity sensor (72); the temperature sensor (71) is used to detect the temperature in the reaction chamber (10); and the humidity sensor (72) is used to detect the humidity in the reaction chamber (10).

7. The photocatalytic reaction device according to claim 1, characterized in that: The photocatalytic reaction device further comprises a filter (42), wherein the filter (42) is arranged in the exhaust pipe (41), and the filter (42) is located between the reaction chamber (10) and the concentration detector (50).

8. The photocatalytic reaction device according to claim 1, characterized in that: The photocatalytic reaction device further comprises a fan (73), and the fan (73) is arranged in the reaction chamber (10).

9. The photocatalytic reaction device according to claim 1, characterized in that: The photocatalytic reaction device further comprises a humidifier (74), and the humidifier (74) is arranged in the reaction chamber (10).

10. The photocatalytic reaction device according to claim 1, characterized in that: The inner wall of the reaction chamber (10) is provided with a cooling channel (12), and the cooling channel (12) is used to circulate cooling water to cool the cavity of the reaction chamber (10).

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