Graded sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, in particular to a graded sewage treatment device. The first treatment assembly comprises a first shell unit, a first supporting unit, a first light-emitting unit and a first photocatalyst; a plurality of pipeline assemblies; one end of the pipeline assembly is detachably connected with the first shell unit, and the other end of the pipeline assembly is detachably connected with the second treatment assembly; one end of the pipeline assembly is detachably connected with the third treatment assembly, and the other end of the pipeline assembly is detachably connected with the second treatment assembly; the processing state comprises that the first light-emitting unit emits ultraviolet light to the first photocatalyst; substances generated by reaction of ultraviolet light emitted by the first light-emitting unit and the first photocatalyst are located in a space surrounded by the first shell unit; sewage sequentially flows through the hollow cavity of the first shell unit, the hollow cavity of the second treatment assembly and the hollow cavity of the third treatment assembly. Therefore, the problem of poor sewage treatment effect is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a hierarchical sewage treatment device. Background Art

[0002] With the rapid advancement of urbanization and industrialization, the amount of industrial sewage and domestic wastewater has greatly increased. If these sewage are discharged directly, they will pollute water resources. Therefore, sewage needs to be treated before it is discharged. Purifying sewage through acid-base neutralization reaction is likely to cause secondary pollution to the environment. Sewage can be treated secondary by photocatalysts. Photocatalysts are a method of treating sewage through photocatalytic oxidation technology. When photocatalyst materials are exposed to light sources, photocatalysts will generate active oxides. These oxides can react with pollutants in sewage and oxidize and decompose them into harmless substances.

[0003] However, in the process of photocatalytic sewage treatment, metal ions in sewage will affect the absorption of ultraviolet light by photocatalysts, which may lead to the fact that the photocatalytic treatment of sewage cannot achieve the desired effect. At the same time, different pollutants have different requirements for photocatalyst size and ultraviolet light wavelength, resulting in poor sewage treatment effect through photocatalysis. Summary of the invention

[0004] In order to solve the problem of poor sewage treatment effect, the present invention provides a hierarchical sewage treatment device, the hierarchical sewage treatment device comprising:

[0005] A first processing component, the first processing component comprises a first housing unit, a first supporting unit, a first light-emitting unit, and a first photocatalyst; the first supporting unit and the first light-emitting unit are respectively detachably connected to the first housing unit; the first supporting unit and the first light-emitting unit are respectively arranged in the hollow cavity of the first housing unit; the first photocatalyst is arranged in a granular shape; the first photocatalyst is coated on the outer surface of the first supporting unit; the diameter of the first photocatalyst is less than 10nm;

[0006] Multiple piping assemblies;

[0007] a second processing assembly, wherein one end of the pipeline assembly is detachably connected to the first housing unit, and the other end is detachably connected to the second processing assembly; the hollow cavity of the first housing unit is connected to the hollow cavity of the second processing assembly through the pipeline assembly;

[0008] a third processing assembly, wherein one end of the pipeline assembly is detachably connected to the third processing assembly, and the other end is detachably connected to the second processing assembly; the hollow cavity of the third processing assembly is connected to the hollow cavity of the second processing assembly through the pipeline assembly;

[0009] The graded sewage treatment device includes a treatment state; the treatment state includes the first light-emitting unit emitting ultraviolet light toward the first photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the first light-emitting unit and the first photocatalyst is located in the space surrounded by the first shell unit; the sewage flows through the hollow cavity of the first shell unit, the hollow cavity of the second treatment component, and the hollow cavity of the third treatment component in sequence.

[0010] In some embodiments, the wavelength of the ultraviolet light emitted by the first light emitting unit is less than 200 nm.

[0011] In some embodiments, the first support unit includes a first support portion and a second support portion; the first support portion and the second support portion are detachably connected to the first housing unit respectively; the first support portion and the second support portion are respectively arranged in a hollow cavity surrounded by the first housing unit; the first support portion and the second support portion are arranged at intervals; the first support portion is sleeved on the outer peripheral side of the second support portion; the first photocatalyst is coated on the outer surface of the first support portion; the first photocatalyst is coated on the outer surface of the second support portion;

[0012] The space enclosed by the outer peripheral surface of the first support part and the first housing unit is the first area; the space enclosed by the inner peripheral wall of the first support part and the outer peripheral wall of the second support part is the second area; the space enclosed by the second support part is the third area; the first area and the second area are connected through the gap of the first photocatalyst on the outer surface of the first support part; the second area and the third area are connected through the gap of the first photocatalyst on the surface of the second support part;

[0013] The treatment state also includes the sewage flowing through the third area, the second area, the first area, the hollow cavity of the second treatment component, and the hollow cavity of the third treatment component in sequence.

[0014] In some embodiments, the first light emitting unit is disposed in the second area.

[0015] In some embodiments, the second processing component includes a second housing unit, a second support unit, a second light-emitting unit, and a second photocatalyst; the second support unit and the second light-emitting unit are detachably connected to the second housing unit respectively; the second support unit and the second light-emitting unit are respectively arranged in the hollow cavity of the second housing unit; the second photocatalyst is arranged in a granular form; the second photocatalyst is coated on the outer surface of the second support unit; the diameter of the second photocatalyst is greater than or equal to 13nm and less than or equal to 20nm; one end of the pipeline component is detachably connected to the first housing unit, and the other end is detachably connected to the second housing unit; the hollow cavity of the first housing unit is connected to the hollow cavity of the second housing unit through the pipeline component;

[0016] The treatment state also includes the second light-emitting unit emitting ultraviolet light toward the second photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the second light-emitting unit with the second photocatalyst is located in the space surrounded by the second outer shell unit; the sewage flows through the hollow cavity of the first outer shell unit, the hollow cavity of the second outer shell unit, and the hollow cavity of the third treatment component in sequence.

[0017] In some embodiments, the wavelength of the ultraviolet light emitted by the second light emitting unit is greater than or equal to 240 nm and less than or equal to 260 nm.

[0018] In some embodiments, the second support unit includes a third support portion and a fourth support portion; the third support portion and the fourth support portion are detachably connected to the first housing unit respectively; the third support portion and the fourth support portion are respectively arranged in a hollow cavity surrounded by the first housing unit; the third support portion and the fourth support portion are arranged at intervals; the third support portion is sleeved on the outer peripheral side of the fourth support portion; the second photocatalyst is coated on the outer surface of the third support portion; the second photocatalyst is coated on the outer surface of the fourth support portion;

[0019] The space surrounded by the outer peripheral surface of the third support portion and the first housing unit is the fourth area; the space surrounded by the inner peripheral wall of the third support portion and the outer peripheral wall of the fourth support portion is the fifth area; the space surrounded by the fourth support portion is the sixth area; the fourth area is connected to the fifth area through the third support portion; the fifth area is connected to the sixth area through the fourth support portion;

[0020] The treatment state also includes the sewage flowing through the hollow cavity of the first housing unit, the sixth area, the fifth area, the fourth area, and the hollow cavity of the third treatment component in sequence.

[0021] In some embodiments, the third processing component includes a third housing unit, a third support unit, a third light-emitting unit, and a third photocatalyst; the third support unit and the third light-emitting unit are detachably connected to the third housing unit respectively; the third support unit and the third light-emitting unit are respectively arranged in the hollow cavity of the third housing unit; the third photocatalyst is arranged in a granular form; the third photocatalyst is detachably connected to the outer surface coated on the third support unit; the diameter of the third photocatalyst is greater than or equal to 8nm and less than 13nm; one end of the pipeline component is detachably connected to the second processing component, and the other end is detachably connected to the third housing unit; the hollow cavity of the second processing component is connected to the hollow cavity of the third housing unit through the pipeline component;

[0022] The treatment state also includes the third light-emitting unit emitting ultraviolet light toward the third photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the third light-emitting unit and the third photocatalyst is located in the space surrounded by the third outer shell unit; the sewage flows through the hollow cavity of the first outer shell unit, the hollow cavity of the second treatment component, and the hollow cavity of the third outer shell unit in sequence.

[0023] In some embodiments, the wavelength of the ultraviolet light emitted by the third light emitting unit is greater than or equal to 200 nm and less than or equal to 230 nm.

[0024] In some embodiments, the third support unit includes a fifth support portion and a sixth support portion; the fifth support portion and the sixth support portion are detachably connected to the third housing unit respectively; the fifth support portion and the sixth support portion are respectively arranged in a hollow cavity surrounded by the third housing unit; the fifth support portion and the sixth support portion are arranged at intervals; the fifth support portion is sleeved on the outer peripheral side of the sixth support portion; the third photocatalyst is coated on the outer surface of the fifth support portion; the third photocatalyst is coated on the outer surface of the sixth support portion;

[0025] The space surrounded by the outer peripheral surface of the fifth support portion and the third housing unit is the seventh area; the space surrounded by the inner peripheral wall of the fifth support portion and the outer peripheral wall of the sixth support portion is the eighth area; the space surrounded by the sixth support portion is the ninth area; the seventh area is connected to the eighth area through the fifth support portion; the eighth area is connected to the ninth area through the sixth support portion;

[0026] The treatment state also includes the sewage flowing through the hollow cavity of the first housing unit, the hollow cavity of the second treatment component, the ninth area, the eighth area, and the seventh area in sequence.

[0027] To solve the problem of poor sewage treatment effect, the present invention has the following advantages:

[0028] The graded sewage treatment device may include a first treatment component, a second treatment component, a third treatment component, and a plurality of pipeline components. The treatment state may include sewage flowing through the hollow cavity of the first housing unit, the hollow cavity of the second treatment component, and the hollow cavity of the third treatment component in sequence. Since the metal ions in the sewage will affect the absorption of ultraviolet light by the photocatalyst, the treatment of sewage by the photocatalyst may not achieve the desired effect. At the same time, since different pollutants have different requirements for the size of the photocatalyst and the wavelength of ultraviolet light, by designing a graded sewage treatment device, the metal ions in the sewage are preferentially treated to prevent the metal ions in the sewage from absorbing ultraviolet light, thereby affecting the reaction of the photocatalyst with ultraviolet light, and then the second treatment component and the third treatment component are designed according to the different requirements of the photocatalyst size and ultraviolet light wavelength of different pollutants to absorb organic matter in the sewage, thereby improving the treatment effect of the sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of a first processing component of an embodiment is shown;

[0030] Figure 2 A schematic diagram of a second processing component of an embodiment is shown;

[0031] Figure 3 A schematic diagram of a third processing component of an embodiment is shown;

[0032] Figure 4 A partial schematic diagram of a hierarchical sewage treatment device according to an embodiment is shown;

[0033] Figure 5 A partial schematic diagram of a hierarchical sewage treatment device according to another embodiment is shown;

[0034] Figure 6 A schematic diagram of a hierarchical sewage treatment device according to an embodiment is shown.

[0035] Figure numerals: 01 first treatment component; 11 first housing unit; 111 first shell; 112 first water inlet; 113 first water outlet; 12 first support unit; 121 first support part; 122 second support part; 13 first light-emitting unit; 14 first photocatalyst; 02 second treatment component; 21 second housing unit; 211 second shell; 212 second water inlet; 213 second water outlet; 22 second support unit; 221 third support part; 222 fourth support part; 23 second light-emitting unit; 24 second photocatalyst; 03 third treatment component; 31 third housing unit; 311 third shell; 312 third water inlet; 313 third water outlet; 32 third support unit; 321 fifth support part; 322 sixth support part; 33 third light-emitting unit; 34 third photocatalyst; 04 pipeline component. DETAILED DESCRIPTION

[0036] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0037] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0038] In this embodiment, during the process of treating sewage by photocatalysis, since the sewage contains a large amount of metal ions, and the metal ions absorb the ultraviolet light in the sewage, the photocatalyst cannot absorb enough ultraviolet light, which leads to poor sewage treatment effect. This embodiment discloses a hierarchical sewage treatment device, such as Figure 1 As shown, the hierarchical sewage treatment device includes: a first treatment component 01, such as Figure 1As shown, the first treatment component 01 may include a first housing unit 11, a first support unit 12, a first light-emitting unit 13, and a first photocatalyst 14. The first support unit 12 and the first light-emitting unit 13 are detachably connected to the first housing unit 11, respectively. The first support unit 12 and the first light-emitting unit 13 are respectively arranged in the hollow cavity of the first housing unit 11. The first photocatalyst 14 may be arranged in a granular form. The first photocatalyst 14 may be coated on the outer surface of the first support unit 12. The diameter of the first photocatalyst 14 may be less than 10 nm. The first photocatalyst 14 may react with metal ions in sewage. When the diameter of the first photocatalyst 14 is small, the surface area per unit mass of the first photocatalyst 14 increases, thereby increasing the active sites on the surface of the first photocatalyst 14 that can react with ultraviolet light, thereby allowing the first photocatalyst 14 to generate more active oxides, which is beneficial to increasing the treatment effect of the first photocatalyst 14 on metal ions in sewage.

[0039] Multiple pipeline components 04. Second processing component 02, one end of the pipeline component 04 is detachably connected to the first housing unit 11, and the other end is detachably connected to the second processing component 02. The hollow cavity of the first housing unit 11 can be connected to the hollow cavity of the second processing component 02 through the pipeline component 04. Third processing component 03, one end of the pipeline component 04 is detachably connected to the third processing component 03, and the other end is detachably connected to the second processing component 02. The hollow cavity of the third processing component 03 can be connected to the hollow cavity of the second processing component 02 through the pipeline component 04. Figure 6 The shown pipeline assembly 04 can be connected to the first treatment assembly 01, the second treatment assembly 02, and the third treatment assembly 03 in sequence, so that the sewage can flow in the first treatment assembly 01, the second treatment assembly 02, and the third treatment assembly 03 in sequence. Then the graded treatment of sewage is realized. The graded sewage treatment device may include a treatment state. The treatment state may include the first light-emitting unit 13 emitting ultraviolet light toward the first photocatalyst 14. The substance generated by the reaction of the ultraviolet light emitted by the first light-emitting unit 13 and the first photocatalyst 14 can be located in the space surrounded by the first housing unit 11. Since the metal ions in the sewage will affect the absorption of ultraviolet light by the photocatalyst, it may cause the photocatalyst to not achieve the ideal effect of sewage treatment. The metal ions in the sewage can be treated first to prevent the metal ions in the sewage from absorbing ultraviolet light, thereby affecting the reaction of the photocatalyst with ultraviolet light. The sewage can flow through the hollow cavity of the first housing unit 11, the hollow cavity of the second treatment assembly 02, and the hollow cavity of the third treatment assembly 03 in sequence. Since different pollutants have different requirements for photocatalyst size and ultraviolet light wavelength, by designing a graded sewage treatment device, the second treatment component 02 and the third treatment component 03 can be designed to absorb organic matter in the sewage and improve the sewage treatment effect according to the different requirements for photocatalyst size and ultraviolet light wavelength of different pollutants.

[0040] In this embodiment, the wavelength of the ultraviolet light emitted by the first light-emitting unit 13 may be less than 200nm. Too long a wavelength may result in insufficient energy of the ultraviolet light, thereby causing the first photocatalyst 14 to be insufficient to react with the ultraviolet light emitted by the first light-emitting unit 13. Therefore, the wavelength of the ultraviolet light emitted by the first light-emitting unit 13 may be less than 200nm, ensuring that the ultraviolet light can fully react with the first photocatalyst 14, thereby improving the treatment effect of the first photocatalyst 14 on metal ions in sewage.

[0041] In this embodiment, the first support unit 12 may include a first support portion 121 and a second support portion 122. The first support portion 121 and the second support portion 122 are respectively detachably connected to the first housing unit 11, thereby fixing the relative positions of the first support portion 121 and the second support portion 122. The first support portion 121 and the second support portion 122 may be respectively arranged in the hollow cavity surrounded by the first housing unit 11. The first support portion 121 and the second support portion 122 may be arranged at intervals. The first support portion 121 may be sleeved on the outer peripheral side of the second support portion 122, and the first support portion 121 and the second support portion 122 may include a plurality of holes penetrating in the radial direction, so that sewage can pass through the first support portion 121 and the second support portion 122. The first photocatalyst 14 may be coated on the outer surface of the first support portion 121. The first photocatalyst 14 may be coated on the outer surface of the second support portion 122.

[0042] The space surrounded by the outer peripheral surface of the first support portion 121 and the first housing unit 11 can be the first area. The space surrounded by the inner peripheral wall of the first support portion 121 and the outer peripheral wall of the second support portion 122 can be the second area. The space surrounded by the second support portion 122 can be the third area. The first area and the second area can be connected through the gap of the first photocatalyst 14 on the outer surface of the first support portion 121. The second area and the third area are connected through the gap of the first photocatalyst 14 on the surface of the second support portion 122. By setting the first area, the second area, and the third area, when the sewage passes through the first treatment component 01, the contact area and contact time of the sewage and the first photocatalyst 14 are increased, so that the metal ions in the sewage can fully contact with the photocatalyst, thereby improving the treatment effect of the first photocatalyst 14 on the metal ions in the sewage.

[0043] The treatment state may also include sewage flowing through the third area, the second area, the first area, the hollow cavity of the second treatment component 02, and the hollow cavity of the third treatment component 03 in sequence. By allowing the sewage to flow through the third area, the second area, the first area, the hollow cavity of the second treatment component 02, and the hollow cavity of the third treatment component 03 in sequence, the sewage can be in contact with the third area, the second area, the first area, the hollow cavity of the second treatment component 02, and the hollow cavity of the third treatment component 03 in sequence, so that the sewage can be fully in contact with the photocatalyst, thereby improving the sewage treatment effect. In other embodiments, such as Figure 4 As shown, sewage can enter the first housing 111 from the first water inlet 112 and flow out from the first water outlet 113 .

[0044] In this embodiment, the first light emitting unit 13 may be disposed in the second region, so that the first light emitting unit 13 may simultaneously irradiate the photocatalyst on the surfaces of the first support portion 121 and the second support portion 122. Figure 5 As shown, the first treatment component 01 may include multiple first light-emitting units 13, and the multiple first light-emitting units 13 may be respectively arranged in the third area and the second area, so that the photocatalyst on the surface of the first support part 121 and the second support part 122 can fully react with the ultraviolet light, thereby improving the sewage treatment effect.

[0045] In this embodiment, if Figure 2 As shown, the second treatment component 02 may include a second housing unit 21, a second support unit 22, a second light-emitting unit 23, and a second photocatalyst 24. The second support unit 22 and the second light-emitting unit 23 are detachably connected to the second housing unit 21, respectively. The second support unit 22 and the second light-emitting unit 23 may be respectively arranged in the hollow cavity of the second housing unit 21. The second photocatalyst 24 may be arranged in a granular form. The second photocatalyst 24 may be coated on the outer surface of the second support unit 22. The diameter of the second photocatalyst 24 may be greater than or equal to 13nm and less than or equal to 20nm. Since sewage contains more formaldehyde, the second photocatalyst 24 may be used to absorb formaldehyde in sewage. When the diameter of the second photocatalyst 24 is greater than or equal to 13nm and less than or equal to 20nm, the surface area per unit mass of the second photocatalyst 24 is larger, so that the second photocatalyst 24 surface can react with ultraviolet light. There are more active sites, which are conducive to increasing the treatment effect of the second photocatalyst 24 on formaldehyde in sewage. At the same time, the larger diameter of the second photocatalyst 24 makes it easier to process the second photocatalyst 24, saving the processing cost of the second photocatalyst 24. One end of the pipeline component 04 is detachably connected to the first housing unit 11, and the other end is detachably connected to the second housing unit 21. The hollow cavity of the first housing unit 11 can be connected to the hollow cavity of the second housing unit 21 through the pipeline component 04.

[0046] The treatment state may also include the second light emitting unit 23 emitting ultraviolet light toward the second photocatalyst 24. The substance generated by the reaction of the ultraviolet light emitted by the second light emitting unit 23 and the second photocatalyst 24 may be located in the space surrounded by the second housing unit 21. The sewage may flow through the hollow cavity of the first housing unit 11, the hollow cavity of the second housing unit 21, and the hollow cavity of the third treatment component 03 in sequence. Since different pollutants have different requirements for the size of the photocatalyst and the wavelength of ultraviolet light, by designing a graded sewage treatment device, the second treatment component 02 may be designed to absorb formaldehyde in the sewage according to the different requirements for the size of the photocatalyst and the wavelength of ultraviolet light for different pollutants, thereby improving the treatment effect of the sewage.

[0047] In this embodiment, the wavelength of the ultraviolet light emitted by the second light-emitting unit 23 can be greater than or equal to 240nm and less than or equal to 260nm. A wavelength that is too long may result in insufficient energy of the ultraviolet light, thereby causing the second photocatalyst 24 to be insufficient to react with the ultraviolet light emitted by the second light-emitting unit 23. At the same time, a wavelength that is too short may result in only a small portion of the ultraviolet light reacting with the second photocatalyst 24. Therefore, the wavelength of the ultraviolet light emitted by the second light-emitting unit 23 can be less than 200nm, ensuring that the ultraviolet light can fully react with the second photocatalyst 24, thereby improving the treatment effect of the second photocatalyst 24 on metal ions in sewage.

[0048] In this embodiment, the second support unit 22 may include a third support portion 221 and a fourth support portion 222. The third support portion 221 and the fourth support portion 222 are respectively detachably connected to the first housing unit 11, thereby fixing the relative positions of the third support portion 221 and the fourth support portion 222. The third support portion 221 and the fourth support portion 222 may be respectively arranged in the hollow cavity surrounded by the first housing unit 11. The third support portion 221 and the fourth support portion 222 may be arranged at intervals. The third support portion 221 may be sleeved on the outer peripheral side of the fourth support portion 222, and the third support portion 221 and the fourth support portion 222 may include a plurality of holes penetrating in the radial direction, so that sewage can pass through the third support portion 221 and the fourth support portion 222. The second photocatalyst 24 may be coated on the outer surface of the third support portion 221. The second photocatalyst 24 may be coated on the outer surface of the fourth support portion 222.

[0049] The space surrounded by the outer peripheral surface of the third support portion 221 and the first housing unit 11 can be the fourth area. The space surrounded by the inner peripheral wall of the third support portion 221 and the outer peripheral wall of the fourth support portion 222 can be the fifth area. The space surrounded by the fourth support portion 222 can be the sixth area. The fourth area and the fifth area can be connected through the third support portion 221. The fifth area and the sixth area can be connected through the fourth support portion 222. The treatment state can also include sewage flowing through the hollow cavity of the first housing unit 11, the sixth area, the fifth area, the fourth area, and the hollow cavity of the third treatment component 03 in sequence. By setting the fourth area, the fifth area, and the sixth area, the contact area and duration of the sewage and the second photocatalyst 24 are increased when the sewage passes through the second treatment component 02, so that the formaldehyde in the sewage can be fully contacted with the photocatalyst, thereby improving the treatment effect of the second photocatalyst 24 on formaldehyde in the sewage. In other embodiments, the sewage can enter the second housing 211 from the second water inlet 212 and flow out from the second water outlet 213.

[0050] In this embodiment, if Figure 3As shown, the third treatment component 03 may include a third housing unit 31, a third support unit 32, a third light-emitting unit 33, and a third photocatalyst 34. The third support unit 32 and the third light-emitting unit 33 are detachably connected to the third housing unit 31, respectively. The third support unit 32 and the third light-emitting unit 33 are respectively arranged in the hollow cavity of the third housing unit 31. The third photocatalyst 34 is arranged in a granular shape. The third photocatalyst 34 is detachably connected to the outer surface coated on the third support unit 32. The diameter of the third photocatalyst 34 may be greater than or equal to 8nm and less than 13nm. Since the sewage contains more formaldehyde, the third photocatalyst 34 can be used to absorb dimethylformamide in the sewage. When the diameter of the third photocatalyst 34 is greater than or equal to 8nm and less than 13nm, the surface area per unit mass of the third photocatalyst 34 is larger, so that the surface of the third photocatalyst 34 can react with ultraviolet light. There are more active sites, which is conducive to increasing the treatment effect of the third photocatalyst 34 on dimethylformamide in the sewage. At the same time, the third photocatalyst 34 is slightly larger than the diameter of the second photocatalyst 24, which makes the processing of the third photocatalyst 34 easier and saves the processing cost of the third photocatalyst 34. Since the volume of the second photocatalyst 24 is large and the processing cost is low, the sewage can be preferentially passed through the second photocatalyst 24 to treat the formaldehyde and part of the dimethylformamide in the sewage, and then the sewage can be passed through the third photocatalyst 34 to further treat the dimethylformamide in the sewage. At the same time, the second photocatalyst 24 is preferentially passed through so that the pollutants in the sewage that react with the third photocatalyst 34 are reduced, and the amount of the third photocatalyst 34 is saved, and the cost of sewage treatment is reduced while ensuring the treatment quality. One end of the pipeline component 04 is detachably connected to the second processing component 02, and the other end is detachably connected to the third housing unit 31. The hollow cavity of the second processing component 02 can be connected to the hollow cavity of the third housing unit 31 through the pipeline component 04.

[0051] The treatment state may also include the third light emitting unit 33 emitting ultraviolet light toward the third photocatalyst 34. The substance generated by the reaction of the ultraviolet light emitted by the third light emitting unit 33 and the third photocatalyst 34 may be located in the space surrounded by the third housing unit 31. The sewage may flow through the hollow cavity of the first housing unit 11, the hollow cavity of the second treatment component 02, and the hollow cavity of the third housing unit 31 in sequence. Since different pollutants have different requirements for the size of the photocatalyst and the wavelength of ultraviolet light, by designing a graded sewage treatment device, the third treatment component 03 may be designed to absorb dimethylformamide in the sewage according to the different requirements for the size of the photocatalyst and the wavelength of ultraviolet light for different pollutants, thereby improving the treatment effect of the sewage.

[0052] In this embodiment, the wavelength of the ultraviolet light emitted by the third light-emitting unit 33 may be greater than or equal to 200nm and less than or equal to 230nm. A wavelength that is too long may result in insufficient energy of the ultraviolet light, thereby causing the third photocatalyst 34 to be insufficient to react with the ultraviolet light emitted by the third light-emitting unit 33. At the same time, a wavelength that is too short may result in only a small portion of the ultraviolet light reacting with the third photocatalyst 34. Therefore, the wavelength of the ultraviolet light emitted by the third light-emitting unit 33 may be less than 200nm, ensuring that the ultraviolet light can fully react with the third photocatalyst 34, thereby improving the treatment effect of the third photocatalyst 34 on dimethylformamide in sewage.

[0053] In this embodiment, the third support unit 32 may include a fifth support portion 321 and a sixth support portion 322. The fifth support portion 321 and the sixth support portion 322 are detachably connected to the third housing unit 31, respectively, so as to fix the relative positions of the fifth support portion 321 and the sixth support portion 322. The fifth support portion 321 and the sixth support portion 322 may be respectively arranged in the hollow cavity surrounded by the third housing unit 31. The fifth support portion 321 and the sixth support portion 322 may be arranged at intervals. The fifth support portion 321 may be sleeved on the outer peripheral side of the sixth support portion 322, and the fifth support portion 321 and the sixth support portion 322 may include a plurality of holes penetrating in the radial direction, so that sewage can pass through the fifth support portion 321 and the sixth support portion 322. The third photocatalyst 34 may be coated on the outer surface of the fifth support portion 321. The third photocatalyst 34 may be coated on the outer surface of the sixth support portion 322.

[0054] The space surrounded by the outer circumference of the fifth support portion 321 and the third housing unit 31 may be the seventh region. The space surrounded by the inner circumferential wall of the fifth support portion 321 and the outer circumferential wall of the sixth support portion 322 may be the eighth region. The space surrounded by the sixth support portion 322 may be the ninth region. The seventh region may be connected to the eighth region through the fifth support portion 321. The eighth region may be connected to the ninth region through the sixth support portion 322. In other embodiments, sewage may enter the third housing 311 from the third water inlet 312 and flow out from the third water outlet 313.

[0055] The treatment state may also include sewage flowing through the hollow cavity of the first housing unit 11, the hollow cavity of the second treatment component 02, the ninth area, the eighth area, and the seventh area in sequence. By setting the ninth area, the eighth area, and the seventh area, when the sewage passes through the third treatment component 03, the contact area and duration between the sewage and the third photocatalyst 34 are increased, so that the dimethylformamide in the sewage can fully contact the photocatalyst, thereby improving the treatment effect of the third photocatalyst 34 on dimethylformamide in the sewage.

[0056] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A hierarchical sewage treatment device, characterized in that: The hierarchical sewage treatment device comprises: A first processing component, the first processing component comprises a first housing unit, a first supporting unit, a first light-emitting unit, and a first photocatalyst; the first supporting unit and the first light-emitting unit are respectively detachably connected to the first housing unit; the first supporting unit and the first light-emitting unit are respectively arranged in the hollow cavity of the first housing unit; the first photocatalyst is arranged in a granular shape; the first photocatalyst is coated on the outer surface of the first supporting unit; the diameter of the first photocatalyst is less than 10nm; Multiple piping assemblies; a second processing assembly, wherein one end of the pipeline assembly is detachably connected to the first housing unit, and the other end is detachably connected to the second processing assembly; the hollow cavity of the first housing unit is connected to the hollow cavity of the second processing assembly through the pipeline assembly; a third processing assembly, wherein one end of the pipeline assembly is detachably connected to the third processing assembly, and the other end is detachably connected to the second processing assembly; the hollow cavity of the third processing assembly is connected to the hollow cavity of the second processing assembly through the pipeline assembly; The graded sewage treatment device includes a treatment state; the treatment state includes the first light-emitting unit emitting ultraviolet light toward the first photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the first light-emitting unit and the first photocatalyst is located in the space surrounded by the first shell unit; the sewage flows through the hollow cavity of the first shell unit, the hollow cavity of the second treatment component, and the hollow cavity of the third treatment component in sequence.

2. A hierarchical sewage treatment device according to claim 1, characterized in that: The wavelength of the ultraviolet light emitted by the first light emitting unit is less than 200 nm.

3. A hierarchical sewage treatment device according to claim 1, characterized in that: The first support unit includes a first support portion and a second support portion; the first support portion and the second support portion are detachably connected to the first housing unit respectively; the first support portion and the second support portion are respectively arranged in a hollow cavity surrounded by the first housing unit; the first support portion and the second support portion are arranged at intervals; the first support portion is sleeved on the outer peripheral side of the second support portion; the first photocatalyst is coated on the outer surface of the first support portion; The first photocatalyst is coated on the outer surface of the second supporting part; The space enclosed by the outer peripheral surface of the first support portion and the first housing unit is a first area; The space enclosed by the inner peripheral wall of the first supporting part and the outer peripheral wall of the second supporting part is the second area; the space enclosed by the second supporting part is the third area; the first area and the second area are connected through the gap of the first photocatalyst on the outer surface of the first supporting part; the second area and the third area are connected through the gap of the first photocatalyst on the surface of the second supporting part; The treatment state also includes the sewage flowing through the third area, the second area, the first area, the hollow cavity of the second treatment component, and the hollow cavity of the third treatment component in sequence.

4. A hierarchical sewage treatment device according to claim 3, characterized in that: The first light emitting unit is disposed in the second area.

5. A hierarchical sewage treatment device according to claim 1, characterized in that: The second processing component includes a second housing unit, a second support unit, a second light-emitting unit, and a second photocatalyst; the second support unit and the second light-emitting unit are respectively detachably connected to the second housing unit; the second support unit and the second light-emitting unit are respectively arranged in the hollow cavity of the second housing unit; the second photocatalyst is arranged in a granular shape; the second photocatalyst is coated on the outer surface of the second support unit; the diameter of the second photocatalyst is greater than or equal to 13nm and less than or equal to 20nm; One end of the pipeline assembly is detachably connected to the first housing unit, and the other end is detachably connected to the second housing unit; the hollow cavity of the first housing unit is connected to the hollow cavity of the second housing unit through the pipeline assembly; The treatment state also includes the second light-emitting unit emitting ultraviolet light toward the second photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the second light-emitting unit with the second photocatalyst is located in the space surrounded by the second outer shell unit; the sewage flows through the hollow cavity of the first outer shell unit, the hollow cavity of the second outer shell unit, and the hollow cavity of the third treatment component in sequence.

6. A hierarchical sewage treatment device according to claim 5, characterized in that: The wavelength of the ultraviolet light emitted by the second light emitting unit is greater than or equal to 240 nm and less than or equal to 260 nm.

7. A hierarchical sewage treatment device according to claim 5, characterized in that: The second support unit includes a third support portion and a fourth support portion; the third support portion and the fourth support portion are detachably connected to the first housing unit respectively; the third support portion and the fourth support portion are respectively arranged in a hollow cavity surrounded by the first housing unit; the third support portion and the fourth support portion are arranged at intervals; the third support portion is sleeved on the outer peripheral side of the fourth support portion; the second photocatalyst is coated on the outer surface of the third support portion; the second photocatalyst is coated on the outer surface of the fourth support portion; The space surrounded by the outer peripheral surface of the third support portion and the first housing unit is the fourth area; the space surrounded by the inner peripheral wall of the third support portion and the outer peripheral wall of the fourth support portion is the fifth area; the space surrounded by the fourth support portion is the sixth area; the fourth area is connected to the fifth area through the third support portion; the fifth area is connected to the sixth area through the fourth support portion; The treatment state also includes the sewage flowing through the hollow cavity of the first housing unit, the sixth area, the fifth area, the fourth area, and the hollow cavity of the third treatment component in sequence.

8. A hierarchical sewage treatment device according to claim 1, characterized in that: The third processing component includes a third housing unit, a third support unit, a third light-emitting unit, and a third photocatalyst; the third support unit and the third light-emitting unit are detachably connected to the third housing unit respectively; the third support unit and the third light-emitting unit are respectively arranged in the hollow cavity of the third housing unit; the third photocatalyst is arranged in a granular form; the third photocatalyst is detachably connected to the outer surface coated on the third support unit; the diameter of the third photocatalyst is greater than or equal to 8nm and less than 13nm; one end of the pipeline component is detachably connected to the second processing component, and the other end is detachably connected to the third housing unit; the hollow cavity of the second processing component is connected to the hollow cavity of the third housing unit through the pipeline component; The treatment state also includes the third light-emitting unit emitting ultraviolet light toward the third photocatalyst; the substance generated by the reaction of the ultraviolet light emitted by the third light-emitting unit and the third photocatalyst is located in the space surrounded by the third outer shell unit; the sewage flows through the hollow cavity of the first outer shell unit, the hollow cavity of the second treatment component, and the hollow cavity of the third outer shell unit in sequence.

9. A hierarchical sewage treatment device according to claim 8, characterized in that: The wavelength of the ultraviolet light emitted by the third light emitting unit is greater than or equal to 200 nm and less than or equal to 230 nm.

10. A hierarchical sewage treatment device according to claim 8, characterized in that: The third support unit includes a fifth support portion and a sixth support portion; the fifth support portion and the sixth support portion are detachably connected to the third housing unit respectively; the fifth support portion and the sixth support portion are respectively arranged in a hollow cavity surrounded by the third housing unit; the fifth support portion and the sixth support portion are arranged at intervals; the fifth support portion is sleeved on the outer peripheral side of the sixth support portion; the third photocatalyst is coated on the outer surface of the fifth support portion; the third photocatalyst is coated on the outer surface of the sixth support portion; The space surrounded by the outer peripheral surface of the fifth support portion and the third housing unit is the seventh area; the space surrounded by the inner peripheral wall of the fifth support portion and the outer peripheral wall of the sixth support portion is the eighth area; the space surrounded by the sixth support portion is the ninth area; the seventh area is connected to the eighth area through the fifth support portion; the eighth area is connected to the ninth area through the sixth support portion; The treatment state also includes the sewage flowing through the hollow cavity of the first housing unit, the hollow cavity of the second treatment component, the ninth area, the eighth area, and the seventh area in sequence.

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