Ultraviolet sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, in particular to an ultraviolet sewage treatment device. The device comprises a box body assembly and a processing assembly. The box body assembly comprises box body units; each box body unit comprises a side plate, a bottom plate and a top plate; a hollow containing cavity is defined by the side plates, the bottom plate and the top plate. The top plate comprises a plate body and a mounting hole; the mounting hole penetrates through the plate body along the thickness direction of the plate body; the processing assembly comprises a photocatalyst unit and a purple light unit; the photocatalyst unit and the purple light unit are both located in the containing cavity. The purple light unit penetrates through the mounting hole and is detachably connected with the plate body; the photocatalyst unit is connected with the bottom plate, or the photocatalyst unit is connected with the side plate; and light emitted by the purple light unit irradiates the surface of the photocatalyst unit. Therefore, the problem that the sewage treatment effect is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a UV sewage treatment device. BACKGROUND

[0002] In the field of sewage treatment, the UV photocatalytic oxidation technology has the characteristics of high efficiency in degrading pollutants. The technology is mainly realized by a UV light source and a photocatalyst, and the two work together to complete the purification process of sewage. Specifically, the UV light source excites the electrons on the surface of the photocatalyst to jump. When the photocatalyst is effectively irradiated by the UV light, a large number of active substances with strong oxidizing properties will be generated on the surface of the photocatalyst. These active substances have oxidation-reduction reactions with organic pollutants in the sewage. Decomposed into water and carbon dioxide and other inorganic small molecule substances, and finally realize the efficient removal of pollutants in the sewage.

[0003] However, there are many light-proof impurities in the sewage. The impurities will adhere to the surface of the photocatalyst and the UV light source during the treatment process, and thus deposit. This will directly cause physical obstruction, block the transmission path of the UV light, and cause the UV light to be unable to fully irradiate the surface of the photocatalyst, ultimately resulting in a significant reduction in the degradation efficiency of the pollutants. SUMMARY

[0004] To solve the problem of poor sewage treatment effect, the present application provides a UV sewage treatment device, comprising: a box assembly, the box assembly comprising a box unit; the box unit comprising a side plate, a bottom plate and a top plate; the side plate, the bottom plate and the top plate surround to form a hollow containing cavity; the top plate comprises a plate body and a mounting hole; the mounting hole penetrates through the plate body along the thickness direction of the plate body; a treatment assembly, the treatment assembly comprising a photocatalyst unit and a UV light unit; the photocatalyst unit and the UV light unit are both located in the containing cavity; the UV light unit is detachably connected with the plate body through the mounting hole; the photocatalyst unit is connected with the bottom plate, or the photocatalyst unit is connected with the side plate; the light emitted by the UV light unit irradiates the surface of the photocatalyst unit.

[0005] In some embodiments, the UV sewage treatment device further comprises a fixing assembly; the fixing assembly comprises a first fixing unit and a second fixing unit; the first fixing unit is connected with the plate body; the first fixing unit is detachably connected with one end of the UV light unit away from the containing cavity; the second fixing unit is connected with the side plate; the second fixing unit is located in the containing cavity; the second fixing unit abuts against the outer circumferential surface of the UV light unit.

[0006] In some embodiments, the second fixing unit comprises a first fixing plate, a first limiting hole, a second fixing plate and a second limiting hole; the first limiting hole penetrates the first fixing plate along the thickness direction of the first fixing plate; the shape of the first limiting hole is adapted to the shape of the cross section of the ultraviolet light unit; the first fixing plate is connected with the side plate; the second limiting hole penetrates the second fixing plate along the thickness direction of the second fixing plate; the shape of the second limiting hole is adapted to the shape of the cross section of the ultraviolet light unit; the ultraviolet light unit passes through at least the first limiting hole or the second limiting hole; and the second fixing plate is connected with the side plate.

[0007] In some embodiments, the box assembly further comprises a transmission unit; the transmission unit comprises a water inlet pipe and a water outlet pipe; the water inlet pipe is in communication with the containing cavity; and the water outlet pipe is in communication with the containing cavity. The minimum included angle between the first fixing plate and the bottom plate is greater than 0° and less than 90°; and the minimum included angle between the second fixing plate and the bottom plate is greater than 0° and less than 90°.

[0008] In some embodiments, two of the photocatalyst units, the side plate, the plate body and the bottom plate form a treatment space; the treatment space has at least one ultraviolet light unit and at least one first fixing plate, or the treatment space has at least one ultraviolet light unit and at least one second fixing plate; there are multiple treatment spaces; and sewage flows through the multiple treatment spaces in sequence.

[0009] In some embodiments, the distance between the end of the first fixing plate close to the water inlet pipe and the bottom plate is less than the distance between the end of the first fixing plate away from the water inlet pipe and the bottom plate; the distance between the end of the second fixing plate close to the water inlet pipe and the bottom plate is greater than the distance between the end of the second fixing plate away from the water inlet pipe and the bottom plate; one of the treatment spaces has at least one first fixing plate, and adjacent treatment spaces have at least one second fixing plate.

[0010] In some embodiments, each of the treatment spaces comprises at least one first fixing plate and at least one second fixing plate; the first fixing plate and the second fixing plate are arranged at intervals along the length direction of the ultraviolet light unit; wherein the first fixing plate is close to the bottom plate, and the second fixing plate is away from the bottom plate.

[0011] In some embodiments, the minimum included angle between the first fixing plate and the bottom plate is a first preset included angle; the minimum included angle between the second fixing plate and the bottom plate is a second preset included angle; and the first preset included angle is greater than the second preset included angle.

[0012] In some embodiments, there are at least two first fixing plates in the treatment space close to the water outlet pipe.

[0013] In some embodiments, the mounting hole is a tapered hole; the large-diameter end of the tapered hole is away from the accommodating cavity; and the small-diameter end of the tapered hole is toward the accommodating cavity.

[0014] To solve the problem of poor sewage treatment effect, the present application has the following advantages: The mounting hole is arranged through the plate body in the thickness direction of the plate body, the ultraviolet light unit of the treatment assembly is detachably connected with the plate body through the mounting hole, the photocatalyst unit is connected with the bottom plate or the side plate and both are located in the accommodating cavity, and the structure arrangement of the light irradiated on the surface of the photocatalyst unit by the ultraviolet light unit can realize convenient disassembly, cleaning or replacement of the ultraviolet light unit, avoid deposition of impurities which are not transparent to light on the surface of the ultraviolet light unit, thereby ensuring that the ultraviolet light unit can continuously and stably output light and fully irradiate the surface of the photocatalyst unit, so that the photocatalyst unit continuously generates strong catalytic oxidation effect, finally solves the problem that ultraviolet light cannot fully irradiate the photocatalyst unit due to deposition of impurities, and ensures the stability and reliability of the sewage treatment effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 An exploded view of the ultraviolet sewage treatment device of an embodiment is shown; Figure 2 A cross-sectional view of the ultraviolet sewage treatment device in Figure 1 is shown; Figure 3 A schematic view of the ultraviolet sewage treatment device of another embodiment is shown; Figure 4 A schematic view of the ultraviolet sewage treatment device of another embodiment is shown; Figure 5 A schematic view of the ultraviolet sewage treatment device of another embodiment is shown; Figure 6 A schematic view of the ultraviolet sewage treatment device of another embodiment is shown.

[0016] Fig. 1 shows a schematic view of the ultraviolet sewage treatment device of an embodiment; Fig. 2 shows a schematic view of the ultraviolet sewage treatment device of another embodiment; Fig. 3 shows a schematic view of the ultraviolet sewage treatment device of another embodiment; Fig. 4 shows a schematic view of the ultraviolet sewage treatment device of another embodiment; Fig. 5 shows a schematic view of the ultraviolet sewage treatment device of another embodiment. DETAILED DESCRIPTION

[0017] The present disclosure will now be discussed with reference to a number of exemplary embodiments. It is to be appreciated that these embodiments are discussed solely for the purpose of enabling a better understanding of and, therefore, the best mode for implementing the present disclosure, and are not intended to suggest any limitation as to the scope of the present disclosure.

[0018] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are to be construed as "including but not limited to." The term "based on" is to be construed as "based at least in part on." The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment." The term "another embodiment" is to be construed as "at least one other embodiment." The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," "longitudinal," and similar terms are used for orientation or position relationships based on the orientation or position relationships shown in the drawings. These terms are primarily used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a particular orientation, or to be constructed and operated in a particular orientation. Also, in addition to indicating orientation or position relationships, some of the above terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances. In addition, the terms "mounting", "providing", "provided with", "connecting", "connected" should be interpreted broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are primarily used to distinguish different devices, elements or components (the specific types and configurations can be the same or different), and are not intended to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0019] In the field of sewage treatment, the ultraviolet photocatalytic oxidation technology has the characteristics of efficient degradation of pollutants. The technology is mainly realized by ultraviolet light source and photocatalyst, and the two complete the purification process of sewage through synergistic effect. Specifically, the ultraviolet light source excites the electrons on the surface of the photocatalyst to jump. When the photocatalyst is effectively irradiated by ultraviolet light, a large number of active substances with strong oxidizing property will be generated on the surface of the photocatalyst. These active substances have redox reaction with organic pollutants in sewage. Decomposed into water and carbon dioxide and other inorganic small molecule substances, and finally realize efficient removal of pollutants in sewage. However, there are many lightproof impurities in sewage, which will be attached to the surface of the photocatalyst and the ultraviolet light source during the treatment process, thereby causing deposition. This will directly cause physical obstruction, block the transmission path of ultraviolet light, cause the ultraviolet light to be unable to fully irradiate the surface of the photocatalyst, and finally cause the degradation efficiency of the pollutants to be greatly reduced.

[0020] In this embodiment, in order to solve the above problems, the present application provides an ultraviolet sewage treatment device. As shown in Figure 1 The ultraviolet sewage treatment device comprises a box assembly 10 and a treatment assembly 20.

[0021] The box assembly 10 comprises a box unit 11, and the box unit 11 comprises a side plate 111, a bottom plate 112 and a top plate 113. The side plate 111, the bottom plate 112 and the top plate 113 surround to form a hollow containing cavity, which provides a reaction space for sewage treatment and avoids sewage leakage. The top plate 113 comprises a plate body 1131 and a mounting hole 1132. The mounting hole 1132 penetrates the plate body 1131 along the thickness direction of the plate body 1131, and provides an adaptive channel for the installation of the ultraviolet light unit 22, so that the ultraviolet light unit 22 can smoothly extend into the containing cavity, and lays a foundation for subsequent ultraviolet irradiation of the photocatalyst unit 21.

[0022] The treatment assembly 20 comprises a photocatalyst unit 21 and an ultraviolet light unit 22. As shown in Figure 2 The photocatalyst unit 21 and the ultraviolet light unit 22 are both located in the containing cavity. The ultraviolet light unit 22 is detachably connected with the plate body 1131 through the mounting hole 1132, so that the ultraviolet light unit 22 can be conveniently cleaned or replaced, and the deposition of lightproof impurities on the surface of the ultraviolet light unit 22 in the sewage is avoided. At the same time, the photocatalyst unit 21 is connected with the bottom plate 112, or the photocatalyst unit 21 is connected with the side plate 111, so as to ensure the stability of the installation of the photocatalyst unit 21. The light emitted by the ultraviolet light unit 22 irradiates the surface of the photocatalyst unit 21, so that the photocatalyst unit 21 produces strong catalytic oxidation effect, thereby solving the problem that the ultraviolet light cannot fully irradiate the photocatalyst due to the deposition of impurities, and ensuring the sewage treatment effect.

[0023] Further, as shown in Figure 2As shown, the ultraviolet sewage treatment device further comprises a fixing assembly 30. The fixing assembly 30 comprises a first fixing unit 31 and a second fixing unit 32. The first fixing unit 31 is connected with the plate body 1131, and the first fixing unit 31 is detachably connected with the end of the purple light unit 22 away from the accommodating cavity, so as to ensure the stability of the installation of the purple light unit 22 and not affect the subsequent maintenance. The second fixing unit 32 is connected with the side plate 111, and the second fixing unit 32 is located in the accommodating cavity. The second fixing unit 32 abuts against the outer circumferential surface of the purple light unit 22, so as to realize the abutting and limiting of the purple light unit 22, avoid the shaking and deviation of the purple light unit 22 during work, ensure the accuracy of the purple light irradiation position, improve the installation reliability of the purple light unit 22, and ensure the stable operation of the catalytic oxidation reaction.

[0024] Further, as shown in Figure 2 、 Figure 3 , the second fixing unit 32 comprises a first fixing plate 321, a first limiting hole 322, a second fixing plate 323 and a second limiting hole 324. The first limiting hole 322 penetrates the first fixing plate 321 along the thickness direction of the first fixing plate 321. The shape of the first limiting hole 322 is matched with the shape of the cross section of the purple light unit 22, so as to facilitate the passing of the purple light unit 22 and accurately limit the purple light unit 22, prevent the shaking and deviation of the purple light unit 22, and ensure that the light irradiated by the purple light unit 22 accurately irradiates the surface of the photocatalyst unit 21. The first fixing plate 321 is connected with the side plate 111, so as to ensure the stable support of the first fixing plate 321 and further improve the installation firmness of the purple light unit 22, so as to ensure the continuity and efficiency of the sewage treatment process.

[0025] The second limiting hole 324 penetrates the second fixing plate 323 along the thickness direction of the second fixing plate 323. The shape of the second limiting hole 324 is matched with the shape of the cross section of the purple light unit 22, and the purple light unit 22 at least passes through the first limiting hole 322 or the second limiting hole 324, that is, one purple light unit 22 at least corresponds to one first fixing plate 321 or one second fixing plate 323, so as to accurately limit the purple light unit 22, prevent the shaking and deviation of the purple light unit 22, and ensure that the light irradiated by the purple light unit 22 accurately irradiates the surface of the photocatalyst unit 21. The second fixing plate 323 is connected with the side plate 111, so as to improve the installation firmness of the purple light unit 22 and ensure the continuity and efficiency of the sewage treatment process.

[0026] Further, as shown in Figure 2 、 Figure 3As shown, the box assembly 10 further comprises a transmission unit 12. The transmission unit 12 comprises an inlet pipe 121 and an outlet pipe 122. The inlet pipe 121 is in communication with the containing cavity to provide a path for the sewage to enter the containing cavity. The outlet pipe 122 is in communication with the containing cavity to provide a path for the treated sewage to exit. The complete sewage transmission loop is formed by the cooperation of the inlet pipe 121 and the outlet pipe 122, ensuring that the sewage treatment can be continuously carried out, and avoiding the situation that the treatment efficiency is too low due to the fact that the sewage cannot smoothly enter and exit.

[0027] The smallest angle between the first fixed plate 321 and the bottom plate 112 is greater than 0° and less than 90°, and the smallest angle between the second fixed plate 323 and the bottom plate 112 is greater than 0° and less than 90°. That is, the first fixed plate 321 and the second fixed plate 323 are arranged obliquely. In this way, the flow path of the sewage in the containing cavity can be changed, the contact time of the sewage with the photocatalyst unit 21 and the violet light emitted by the violet light unit 22 can be prolonged, and the deposition of impurities in the sewage on the surface of the fixed plate and the violet light unit 22 can be reduced, thereby ensuring the working efficiency of the photocatalyst unit 21 and the violet light unit 22 and improving the completeness of the sewage treatment.

[0028] Further, as shown, Figure 2 The two photocatalyst units 21, the side plate 111, the plate body 1131 and the bottom plate 112 form a treatment space. By arranging multiple treatment spaces, the sewage can be subjected to multiple rounds of oxidation catalytic treatment in sequence, and the pollutants in the sewage can be gradually degraded. The sewage flows through the multiple treatment spaces in sequence. In each treatment space, there is at least one violet light unit 22 and at least one first fixed plate 321, or at least one violet light unit 22 and at least one second fixed plate 323, so that the violet light unit 22 in each treatment space can cooperate with the first fixed plate 321 or the second fixed plate 323, ensuring that each round of treatment can fully play a role and significantly improving the effect of sewage treatment, thereby meeting higher requirements for sewage purification.

[0029] Further, as shown, Figure 3As shown, the distance between the first fixed plate 321 close to one end of the water inlet pipe 121 and the bottom plate 112 is smaller than the distance between the first fixed plate 321 away from the other end of the water inlet pipe 121 and the bottom plate 112. The distance between the second fixed plate 323 close to one end of the water inlet pipe 121 and the bottom plate 112 is larger than the distance between the second fixed plate 323 away from the other end of the water inlet pipe 121 and the bottom plate 112. At least one first fixed plate 321 is arranged in one processing space, and at least one second fixed plate 323 is arranged in the adjacent processing space, that is, the inclination directions of the first fixed plate 321 and the second fixed plate 323 are opposite. In this way, the turbulent flow of sewage in the processing space can be guided, the contact area and contact time of the sewage with the photocatalyst unit 21 and the purple light unit 22 are increased, and at the same time, since most of the impurities in the sewage are located in the upper part or the bottom part of the accommodating cavity, the structure with different inclination directions can guide the parts with more serious deposition to the middle part, so as to reduce the deposition of impurities, ensure the processing efficiency of each processing space, and further improve the overall sewage treatment efficiency.

[0030] Further, as shown in Figure 4 Each processing space includes at least one first fixed plate 321 and at least one second fixed plate 323. The first fixed plate 321 and the second fixed plate 323 are arranged at intervals along the length direction of the purple light unit 22, wherein the first fixed plate 321 is close to the bottom plate 112, and the second fixed plate 323 is away from the bottom plate 112. The first fixed plate 321 and the second fixed plate 323 arranged at intervals along the length direction of the purple light unit 22 limit and fix the purple light unit 22 from different heights, further improving the installation stability of the purple light unit 22, and avoiding shaking during work. The combined arrangement of the first fixed plate 321 and the second fixed plate 323 can more comprehensively guide the turbulent flow of sewage in the processing space, increase the contact area and contact time of the sewage with the photocatalyst unit 21 and the purple light unit 22, and ensure the uniform distribution of the sewage in the entire accommodating cavity, thereby ensuring the treatment effect of the sewage in the accommodating cavity.

[0031] Further, as shown in Figure 5 The smallest angle between the first fixed plate 321 and the bottom plate 112 is a first preset angle. The smallest angle between the second fixed plate 323 and the bottom plate 112 is a second preset angle. The first preset angle is larger than the second preset angle, so that the guiding strength of the first fixed plate 321 and the second fixed plate 323 to the flow of sewage is different. Since the sewage located at the bottom has a higher concentration, the angle of the first preset angle is designed to be larger, so that the flow rate of the sewage is relatively slow, thereby avoiding that the local flow rate is too fast to cause insufficient treatment, and ensuring the stability and efficiency in the sewage treatment process.

[0032] Further, as shown in Figure 6As shown, the treatment space close to the outlet pipe 122 has at least two first fixed plates 321. The treatment space close to the outlet pipe 122 is the end stage of sewage treatment, and through the two first fixed plates 321, it can ensure that the sewage flowing to the outlet pipe 122 can have sufficient treatment time, reduce the deposition of impurities in the end treatment area, ensure the end treatment efficiency, and make the finally discharged sewage reach a higher purification standard.

[0033] Further, the mounting hole 1132 is a tapered hole, the large-diameter end of the tapered hole is away from the accommodation cavity, which enlarges the insertion entrance of the ultraviolet light unit 22 and reduces the difficulty of installation operation, and the small-diameter end of the tapered hole is towards the accommodation cavity, which can accurately position the ultraviolet light unit 22, ensure the installation position of the ultraviolet light unit 22, make the ultraviolet light accurately irradiate the surface of the photocatalyst unit 21, and at the same time, the tapered structure facilitates the cleaning of impurities on the inner wall of the mounting hole 1132, avoids the accumulation of impurities affecting the disassembly and working stability of the ultraviolet light unit 22, and guarantees the continuity of sewage treatment.

[0034] In some other embodiments, the photocatalyst unit 21 includes a carrier part and a catalytic part. The carrier part is connected with the side plate 111 or the bottom plate 112. The carrier part is located in the accommodation cavity, and the catalytic part is attached to the surface of the carrier part. At the same time, the catalytic part can also be attached to the first fixed plate 321 and the second fixed plate 323, thereby improving the effect of catalytic oxidation, further increasing the contact area between the sewage and the catalytic part, and thereby improving the treatment effect of the sewage. The carrier part can be a fiber carrier, and the catalytic part can be titanium dioxide, tin oxide, cadmium sulfide, tungsten trioxide, ferrous oxide, lead sulfide, and tin dioxide loaded on nano particles.

[0035] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual application, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. An ultraviolet wastewater treatment device, characterized in that, The ultraviolet wastewater treatment device includes: A housing assembly, comprising a housing unit; the housing unit comprising a side panel, a bottom panel, and a top panel; the side panel, the bottom panel, and the top panel surround to form a hollow receiving cavity; the top panel comprising a plate and a mounting hole; the mounting hole penetrating the plate along its thickness direction; The processing component includes a photocatalyst unit and a violet light unit; both the photocatalyst unit and the violet light unit are located within the receiving cavity; the violet light unit is detachably connected to the plate through the mounting hole; the photocatalyst unit is connected to the base plate or the photocatalyst unit is connected to the side plate; the light emitted by the violet light unit illuminates the surface of the photocatalyst unit.

2. The ultraviolet wastewater treatment device according to claim 1, characterized in that, The ultraviolet wastewater treatment device further includes a fixing assembly; the fixing assembly includes a first fixing unit and a second fixing unit; the first fixing unit is connected to the plate; the first fixing unit is detachably connected to the end of the ultraviolet light unit away from the receiving cavity; the second fixing unit is connected to the side plate; the second fixing unit is located inside the receiving cavity; the second fixing unit abuts against the outer peripheral surface of the ultraviolet light unit.

3. The ultraviolet wastewater treatment device according to claim 2, characterized in that, The second fixing unit includes a first fixing plate, a first limiting hole, a second fixing plate, and a second limiting hole; the first limiting hole penetrates the first fixing plate along its thickness direction; the shape of the first limiting hole is adapted to the cross-sectional shape of the ultraviolet light unit; the first fixing plate is connected to the side plate; the second limiting hole penetrates the second fixing plate along its thickness direction; the shape of the second limiting hole is adapted to the cross-sectional shape of the ultraviolet light unit; the ultraviolet light unit passes through at least the first limiting hole or the second limiting hole; the second fixing plate is connected to the side plate.

4. The ultraviolet wastewater treatment device according to claim 3, characterized in that, The housing assembly further includes a transmission unit; the transmission unit includes an inlet pipe and an outlet pipe; the inlet pipe is connected to the receiving cavity; the outlet pipe is connected to the receiving cavity. The minimum angle between the first fixing plate and the base plate is greater than 0° and less than 90°; the minimum angle between the second fixing plate and the base plate is greater than 0° and less than 90°.

5. The ultraviolet wastewater treatment device according to claim 4, characterized in that, The two photocatalyst units, the side plate, the plate body, and the bottom plate surround to form a processing space; the processing space has at least one ultraviolet light unit and at least one first fixing plate, or the processing space has at least one ultraviolet light unit and at least one second fixing plate; The treatment space has multiple spaces; wastewater flows through multiple treatment spaces in sequence.

6. The ultraviolet wastewater treatment device according to claim 5, characterized in that, The distance between the end of the first fixing plate closest to the water inlet pipe and the bottom plate is less than the distance between the end of the first fixing plate furthest from the water inlet pipe and the bottom plate. The distance between the end of the second fixing plate closest to the water inlet pipe and the bottom plate is greater than the distance between the end of the second fixing plate furthest from the water inlet pipe and the bottom plate. Each of the processing spaces has at least one first fixing plate, and adjacent processing spaces have at least one second fixing plate.

7. The ultraviolet wastewater treatment device according to claim 6, characterized in that, Each of the processing spaces includes at least one first fixing plate and at least one second fixing plate; the first fixing plate and the second fixing plate are spaced apart along the length direction of the ultraviolet light unit; wherein the first fixing plate is close to the base plate and the second fixing plate is away from the base plate.

8. The ultraviolet wastewater treatment device according to claim 7, characterized in that, The minimum angle between the first fixing plate and the base plate is a first preset angle; the minimum angle between the second fixing plate and the base plate is a second preset angle; the first preset angle is greater than the second preset angle.

9. The ultraviolet wastewater treatment device according to claim 5, characterized in that, The processing space near the outlet pipe has at least two of the first fixing plates.

10. The ultraviolet wastewater treatment device according to claim 1, characterized in that, The mounting hole is a tapered hole; the large-diameter end of the tapered hole faces away from the receiving cavity; the small-diameter end of the tapered hole faces into the receiving cavity.

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