Waste gas treatment device based on photocatalysis

Abstract

The utility model relates to the technical field of waste gas treatment equipment, in particular to a waste gas treatment device based on photocatalysis, which comprises a tubular reactor body, a conical flow baffle and a conical gas outlet plate are fixedly arranged in the tubular reactor body, and a mixing mechanism for accelerating mutual impact of waste gas and outside air is arranged in the tubular reactor body. According to the utility model, the mixing mechanism is additionally arranged in the tubular reactor, so that waste gas is forcibly mixed with outside air, and the whole mixed gas is pushed to rotate in the tubular reactor, so that the contact area between the mixed gas and the vacuum ultraviolet lamp as well as the photocatalyst is further increased; through the arrangement, the length of the tubular reactor can be shortened, the relative efficiency of the waste gas oxidation-reduction reaction does not need to be exchanged by using space and time, and the catalytic effect in unit space is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment equipment, in particular to a waste gas treatment device based on photocatalysis. Background Art

[0002] Photocatalytic oxidation is suitable for completely oxidizing waste gas into non-toxic and harmless substances at room temperature. It is suitable for treating waste gas with high concentration, large volume, strong stability and photon-absorbing toxic and harmful gases. Photocatalytic oxidation uses vacuum wave ultraviolet light generated by artificial ultraviolet lamps as energy to activate photocatalysts and drive oxidation-reduction reactions. In addition, photocatalysts are not consumed during the reaction. It uses oxygen in the air as an oxidant to effectively degrade toxic and harmful waste gas, which is the biggest feature of photocatalytic energy saving.

[0003] The structural forms of photocatalytic reactors that are frequently mentioned in the literature mainly include: flat-plate type, tubular type, honeycomb type and optical fiber reactors, etc. In the existing tubular photocatalytic reactor, the flow direction of the exhaust gas is the same as the axial direction of the ultraviolet light source. In order to improve the effective collision and combination of the exhaust gas and the oxygen in the air, the tubular photocatalytic reactor needs to be designed to be very long as a whole, and a longer space is used to improve the effect of oxygen in the air as an oxidant, and the space and longer introduction time are used in exchange for efficient catalytic effects. However, the longer reactor body occupies a large area and is not suitable for the use needs of small production plants. Therefore, a waste gas treatment device based on photocatalysis is proposed. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a waste gas treatment device based on photocatalysis, which solves the technical problem that the existing photocatalytic reactor equipment body is too long.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a waste gas treatment device based on photocatalysis, comprising a tubular reactor body, a conical baffle plate and a conical air outlet plate are fixedly arranged in the tubular reactor body, and a mixing mechanism for accelerating the mutual impact between the waste gas and the outside air is arranged in the tubular reactor body;

[0006] The mixing mechanism comprises a hollow rotating shaft rotatably arranged in the tubular reactor body and a driving motor arranged outside the tubular reactor body, wherein the output end of the driving motor is fixedly connected to the hollow rotating shaft through a coupling; a plurality of gas outlet components are evenly arranged on the hollow rotating shaft, wherein the gas outlet components are composed of two vertical fixed plates and a stirring plate, wherein the vertical fixed plates are arranged on the hollow rotating shaft, and the stirring plate is fixedly arranged between the two vertical fixed plates in an inclined manner, and a photocatalytic component is also arranged on the hollow rotating shaft;

[0007] The mixing mechanism also includes an annular air baffle plate rotatably arranged on the conical air outlet plate, the vertical fixed plate is fixedly connected to the annular air baffle plate through a connecting column, a plurality of exhaust holes are provided on the conical air outlet plate, and a rectangular through hole used in conjunction with the exhaust holes is provided on the annular air baffle plate.

[0008] Preferably, two L-shaped air storage channels are provided inside the stirring plate, and the two L-shaped air storage channels are arranged in a centrally symmetrical manner as a whole. An air guide channel is provided in the vertical fixed plate, and the two air guide channels are respectively interconnected with the two L-shaped air storage channels; two groups of air outlet holes are also fixedly provided on the stirring plate, and the two groups of air outlet holes are respectively interconnected with the two L-shaped air storage channels.

[0009] Preferably, the tubular reactor body is further provided with an air intake assembly for facilitating the entry of outside air, the air intake assembly comprising an air guide shell fixedly arranged in the tubular reactor body and an air intake pipe arranged on the tubular reactor body, the air intake pipe and the air guide shell are interconnected, two air intake holes are provided on the hollow shaft and in the air guide shell, the two air intake holes are interconnected with one of the air guide channels through a cylindrical air intake channel in the hollow shaft;

[0010] The tubular reactor body is provided with an exhaust gas inlet pipe, and two exhaust gas inlet holes are provided on the hollow shaft and located on the inner side of the conical baffle. The two exhaust gas inlet holes are connected to another air guide channel through a cylindrical air inlet channel in the hollow shaft.

[0011] Preferably, the photocatalytic component includes two fixing rings symmetrically arranged on the hollow rotating shaft, a plurality of vacuum ultraviolet lamps are fixedly arranged between the two fixing rings, and the photocatalytic component also includes a photocatalyst coated on the inner wall of the tubular reactor body.

[0012] Preferably, the photocatalyst is made of TiO2 catalyst.

[0013] Preferably, the number of the air outlet assemblies is five, and the stirring plate is arranged at an angle of 45° with the central axis of the vertical fixed plate in the vertical plane.

[0014] Preferably, the tubular reactor body is also provided with an exhaust pipe.

[0015] By means of the above technical solution, the utility model provides an exhaust gas treatment device based on photocatalysis, which has at least the following beneficial effects:

[0016] 1. The utility model adds a mixing mechanism in the tubular reactor, thereby forcibly mixing the exhaust gas with the outside air, and promotes the entire mixed gas to rotate in the tubular reactor, further increasing the contact area between the mixed gas and the vacuum ultraviolet lamp and the photocatalyst. This arrangement can shorten the length of the tubular reactor, eliminate the need to use space and time in exchange for the relative efficiency of the exhaust gas oxidation-reduction reaction, and greatly improve the catalytic effect per unit space.

[0017] 2. The utility model utilizes an inclined stirring plate to achieve the discharge of exhaust gas and outside air, and multiple groups of stirring plates can interfere with the flow direction of the gas so that the exhaust gas and the outside air collide with each other, and multiple groups of stirring plates can be rotatably arranged in the tubular reactor, thereby driving the entire mixed gas and the photocatalyst coating to produce an effective collision, thereby improving the actual contact between the exhaust gas and the photocatalyst and the vacuum ultraviolet lamp, and greatly shortening the unit time of exhaust gas photocatalysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the appearance structure of the tubular reactor of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the tubular reactor of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the hybrid mechanism of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the photocatalytic component of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the air intake assembly of the utility model;

[0024] Figure 6 This is a cross-sectional view of the stirring plate of the utility model;

[0025] Figure 7 This is a schematic diagram of the gas flow structure inside the tubular reactor of the utility model.

[0026] In the figure: 1. tubular reactor body; 2. mixing mechanism; 101. conical baffle; 102. conical air outlet plate; 103. exhaust gas inlet pipe; 104. exhaust pipe; 201. hollow shaft; 202. drive motor; 203. vertical fixing plate; 204. stirring plate; 2041. L-shaped gas storage channel; 2042. air outlet hole; 205. fixing ring; 206. vacuum ultraviolet lamp; 207. connecting column; 208. annular air baffle; 209. air guide shell; 210. air inlet pipe. DETAILED DESCRIPTION

[0027] 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. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Embodiment 1

[0029] Please refer to Figure 1-Figure 4 , a waste gas treatment device based on photocatalysis, comprising a tubular reactor body 1, a conical baffle plate 101 and a conical air outlet plate 102 are fixedly arranged in the tubular reactor body 1, and a mixing mechanism 2 for accelerating the impact between the waste gas and the outside air is arranged in the tubular reactor body 1;

[0030] The mixing mechanism 2 includes a hollow rotating shaft 201 rotatably arranged in the tubular reactor body 1 and a driving motor 202 arranged outside the tubular reactor body 1, and the output end of the driving motor 202 is fixedly connected to the hollow rotating shaft 201 through a coupling; a plurality of gas outlet components are evenly distributed on the hollow rotating shaft 201, and the gas outlet components are composed of two vertical fixed plates 203 and a stirring plate 204, the vertical fixed plates 203 are arranged on the hollow rotating shaft 201, and the two vertical fixed plates 203 are in the same vertical plane, and the stirring plate 204 is fixedly arranged between the two vertical fixed plates 203 in an inclined manner;

[0031] The mixing mechanism 2 also includes an annular air baffle plate 208 rotatably arranged on the conical air outlet plate 102, the vertical fixed plate 203 is fixedly connected to the annular air baffle plate 208 via a connecting column 207, a plurality of exhaust holes are provided on the conical air outlet plate 102, and a rectangular through hole used in conjunction with the exhaust holes is provided on the annular air baffle plate 208;

[0032] Furthermore, the number of the air outlet components is five, and the stirring plate 204 is arranged at an angle of 45° with the central axis of the vertical fixing plate 203 in the vertical plane;

[0033] Furthermore, a photocatalytic component is also provided on the hollow rotating shaft 201, and the photocatalytic component includes two fixed rings 205 symmetrically arranged on the hollow rotating shaft 201, and a plurality of vacuum ultraviolet lamps 206 are fixedly arranged between the two fixed rings 205. The photocatalytic component also includes a photocatalyst coated on the inner wall of the tubular reactor body 1, and the material of the photocatalyst is a TiO2 catalyst; the vacuum ultraviolet lamp 206 arranged on the hollow rotating shaft 201 can excite the TiO2 catalyst in the tubular reactor body 1, thereby providing the original conditions for photocatalysis.

[0034] As can be seen from the above, the motion state of the entire mixing mechanism 2 is specifically as follows: the driving motor 202 is powered on, thereby driving the hollow shaft 201 to rotate. The rotation of the hollow shaft 201 can drive the multiple groups of gas outlet components arranged on the hollow shaft 201 to rotate. Since the stirring plates 204 in the gas outlet components are arranged at an angle, the rotation of the hollow shaft 201 drives the five inclined stirring plates 204 to rotate. The rotation of the stirring plates 204 drives the gas in the tubular reactor body 1 to flow; when the hollow shaft 201 rotates, it will drive the multiple vertical fixed plates 203 to rotate, and then drive the connecting column 207 fixed on one side of the vertical fixed plate 203 to rotate. Since the connecting column 207 is fixedly connected to the annular air baffle plate 208, the hollow shaft 201 can drive the annular air baffle plate 208 to rotate after the rotation. This is the motion analysis of each part in the entire mixing mechanism 2.

[0035] Embodiment 2

[0036] Please refer to Figure 2-Figure 7 This embodiment is basically the same as the first embodiment. This embodiment is made on the basis of the first embodiment and has the same beneficial effects as the first embodiment. The same parts can be referred to each other and will not be described in detail here.

[0037] As a further technical solution of this embodiment, two L-shaped gas storage channels 2041 are provided inside the stirring plate 204, and the two L-shaped gas storage channels 2041 are arranged symmetrically with respect to the center as a whole. An air guide channel is provided inside the vertical fixed plate 203, and the two air guide channels are respectively connected to the two L-shaped gas storage channels 2041; two groups of gas outlet holes 2042 are also fixedly provided on the stirring plate 204, and the two groups of gas outlet holes 2042 are respectively connected to the two L-shaped gas storage channels 2041;

[0038] The tubular reactor body 1 is also provided with an air intake assembly for facilitating the entry of outside air. The air intake assembly includes an air guide shell 209 fixedly arranged in the tubular reactor body 1 and an air inlet pipe 210 arranged on the tubular reactor body 1. The air inlet pipe 210 is interconnected with the air guide shell 209. Two air inlet holes are provided on the hollow shaft 201 and located in the air guide shell 209. The two air inlet holes are interconnected with one of the air guide channels through a cylindrical air intake channel in the hollow shaft 201.

[0039] An exhaust pipe 104 is also provided on the tubular reactor body 1. A waste gas inlet pipe 103 is provided on the tubular reactor body 1. Two waste gas inlet holes are provided on the hollow shaft 201 and located on the inner side of the conical baffle 101. The two waste gas inlet holes are connected to another gas guide channel through the cylindrical air inlet channel inside the hollow shaft 201.

[0040] From the motion trajectories of the various parts in the mixing mechanism 2 of the first embodiment, it can be seen that the specific flow path of the gas inside the tubular reactor body 1 is divided into an exhaust gas flow path and an external air flow path;

[0041] The flow path of the exhaust gas is as follows: the exhaust gas to be treated is introduced into the tubular reactor body 1 through the exhaust gas inlet pipe 103. The exhaust gas enters the left side of the tubular reactor body 1 and is blocked by the conical baffle plate 101. The blocked exhaust gas then enters the cylindrical air inlet channel in the hollow shaft 201 through two exhaust gas inlet holes, and finally enters the air guide channel in the left vertical fixed plate 203. The exhaust gas entering the air guide channel of the left vertical fixed plate 203 then enters the L-shaped air storage channel 2041 above the stirring plate 204, and is finally discharged from the air outlet hole 2042 above the stirring plate 204. Since the stirring plate 204 rotates inside the tubular reactor body 1, the exhaust gas continuously impacts the inner wall of the tubular reactor body 1 when being discharged. Figure 7 As shown;

[0042] The flow path of the external air is that the air introduced through the air inlet pipe 210 will enter the air guide shell 209, and the air in the air guide shell 209 will then enter the cylindrical air inlet channel in the hollow shaft 201 through the air inlet hole, and finally enter the air guide channel in the right vertical fixed plate 203. The air entering the air guide channel of the right vertical fixed plate 203 will then enter the L-shaped air storage channel 2041 below the stirring plate 204, so the air will be discharged from the air outlet hole 2042 below the stirring plate 204. Since the stirring plate 204 is arranged as a whole in an inclined manner, the air discharged from the stirring plate 204 will impact the middle part of the stirring plate 204 behind it. Figure 7 As shown, since the stirring plate 204 rotates around the hollow rotating shaft 201, the exhausted air will flow toward the middle of the hollow rotating shaft 201;

[0043] When the exhaust gas and air discharged from the stirring plates 204 enter the tubular reactor body 1, the exhaust gas and air will form a mixed gas, and the multiple stirring plates 204 rotate around the hollow shaft 201 to drive the mixed gas to rotate in the tubular reactor body 1. The rotating mixed gas is then impacted by the exhausted exhaust gas and air, thereby increasing the relative contact area between the exhaust gas and oxygen in the air;

[0044] The mixed gas is discharged because the annular air baffle plate 208 rotates on the conical air outlet plate 102, and the conical air outlet plate 102 is provided with multiple groups of exhaust holes, and the annular air baffle plate 208 is provided with only one rectangular through hole. Therefore, when the rectangular through hole coincides with the exhaust hole, the mixed gas can be discharged from the exhaust hole, while the remaining exhaust holes are blocked by the annular air baffle plate 208, thus forming a cyclic intermittent gas discharge of the conical air outlet plate 102. Since the mixed gas is discharged cyclically and intermittently, the mixed gas is correspondingly blocked in the tubular reactor body 1, thereby improving the photocatalytic efficiency.

[0045] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the above embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device based on photocatalysis, comprising a tubular reactor body (1), characterized in that: A conical baffle plate (101) and a conical air outlet plate (102) are fixedly arranged in the tubular reactor body (1), and a mixing mechanism (2) for accelerating the mutual impact between the exhaust gas and the outside air is arranged in the tubular reactor body (1); The mixing mechanism (2) comprises a hollow rotating shaft (201) rotatably arranged in the tubular reactor body (1) and a driving motor (202) arranged outside the tubular reactor body (1), wherein the output end of the driving motor (202) is fixedly connected to the hollow rotating shaft (201) via a coupling; a plurality of groups of gas outlet components are evenly distributed on the hollow rotating shaft (201), wherein the gas outlet components are composed of two vertical fixed plates (203) and a stirring plate (204); the vertical fixed plates (203) are arranged on the hollow rotating shaft (201), and the stirring plate (204) is fixedly arranged between the two vertical fixed plates (203) in an inclined manner; and a photocatalytic component is also arranged on the hollow rotating shaft (201); The mixing mechanism (2) further comprises an annular air baffle plate (208) rotatably arranged on the conical air outlet plate (102); the vertical fixed plate (203) is fixedly connected to the annular air baffle plate (208) via a connecting column (207); a plurality of exhaust holes are provided on the conical air outlet plate (102); and a rectangular through hole is provided on the annular air baffle plate (208) for use with the exhaust holes.

2. The exhaust gas treatment device based on photocatalysis according to claim 1, characterized in that: Two L-shaped gas storage channels (2041) are provided inside the stirring plate (204), and the two L-shaped gas storage channels (2041) are arranged in a centrally symmetrical manner as a whole. An air guide channel is provided inside the vertical fixed plate (203), and the two air guide channels are respectively connected to the two L-shaped gas storage channels (2041); two groups of gas outlet holes (2042) are also fixedly provided on the stirring plate (204), and the two groups of gas outlet holes (2042) are respectively connected to the two L-shaped gas storage channels (2041).

3. The exhaust gas treatment device based on photocatalysis according to claim 2 is characterized in that: The tubular reactor body (1) is also provided with an air intake assembly for facilitating the entry of outside air, the air intake assembly comprising an air guide shell (209) fixedly arranged in the tubular reactor body (1) and an air intake pipe (210) arranged on the tubular reactor body (1), the air intake pipe (210) and the air guide shell (209) being interconnected, two air intake holes being provided on the hollow rotating shaft (201) and located in the air guide shell (209), the two air intake holes being interconnected with one of the air guide channels through a cylindrical air intake channel in the hollow rotating shaft (201); The tubular reactor body (1) is provided with an exhaust gas inlet pipe (103), and the hollow shaft (201) is provided with two exhaust gas inlet holes located on the inner side of the conical baffle (101), and the two exhaust gas inlet holes are connected to another gas guide channel through a cylindrical air inlet channel inside the hollow shaft (201).

4. The exhaust gas treatment device based on photocatalysis according to claim 1, characterized in that: The photocatalytic component comprises two fixing rings (205) symmetrically arranged on a hollow rotating shaft (201), a plurality of vacuum ultraviolet lamps (206) are fixedly arranged between the two fixing rings (205), and the photocatalytic component also comprises a photocatalyst coated on the inner wall of the tubular reactor body (1).

5. The exhaust gas treatment device based on photocatalysis according to claim 4 is characterized in that: The material of the photocatalyst is TiO2 catalyst.

6. The exhaust gas treatment device based on photocatalysis according to claim 1, characterized in that: The number of the air outlet components provided is five, and the stirring plate (204) is provided at an angle of 45° with the central axis of the vertical fixing plate (203) in the vertical plane.

7. The exhaust gas treatment device based on photocatalysis according to claim 1, characterized in that: The tubular reactor body (1) is also provided with an exhaust pipe (104).

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