Medical wastewater environment-friendly treatment device and treatment method

Abstract

The invention relates to an environment-friendly treatment device and method for medical wastewater. The treatment device comprises a treatment box; the filter barrel is rotationally mounted in the treatment box, the rotating axis of the filter barrel is parallel to the horizontal plane, a plurality of filter holes are formed in the outer circumferential wall of the cambered surface of the filter barrel in a penetrating manner, and a transparent panel is arranged at one axial end of the filter barrel; the illumination direction of the first ultraviolet lamp corresponds to the transparent panel; the slag scraping mechanism is used for scraping suspended matters adhered to the inner circumferential wall of the cambered surface of the filter barrel when the water level in the filter barrel rises to a set value; the driving mechanism is used for driving the filter barrel to rotate in the treatment box; the input end of the front disinfection tank is communicated with a wastewater source, and the output end of the front disinfection tank is connected with a water supply pipe extending into the filter barrel; and a chlorine dioxide disinfection system is arranged in the front disinfection tank. Medical wastewater and suspended solids thereof can be comprehensively disinfected through the chlorine dioxide disinfection system and the first ultraviolet lamp, and chlorine dioxide residues and affiliated products thereof can be decomposed.

Description

Technical Field

[0001] The present application relates to the technical field of medical wastewater treatment, and in particular to an environmentally friendly medical wastewater treatment device and method. Background Art

[0002] Medical wastewater is mainly discharged from the hospital's treatment rooms, laboratories, wards, laundry rooms, X-ray studios and operating rooms, and its source and composition are very complex. Medical wastewater contains a large number of pollutants such as organic matter, chemicals, pathogens (such as bacteria, viruses and parasites). If it is discharged directly without treatment, it will cause serious pollution to the environment and may spread diseases through water sources. It has the characteristics of space pollution, acute infection and latent infection. Therefore, medical wastewater needs to be thoroughly treated before it can be discharged.

[0003] In the related art, a Chinese patent with application number CN202411231397.5 proposes a multi-stage treatment system for medical wastewater. It includes a physical treatment unit, a chemical treatment unit, a biological treatment unit and a disinfection unit connected in sequence; the physical treatment unit includes a filter box, the chemical treatment unit includes a regulating tank, the biological treatment unit includes an aeration tank, and the disinfection unit includes a disinfection box. The inlet of the filter box is connected to the external wastewater source, the outlet of the filter box is connected to the inlet of the regulating tank, the outlet of the regulating tank is connected to the inlet of the aeration tank, and the outlet of the aeration tank is connected to the inlet of the disinfection box. This application uses a physical treatment unit, a chemical treatment unit, a biological treatment unit and a disinfection unit to perform physical filtration, chemical regulation, biodegradation and disinfection treatment on the wastewater in sequence, and comprehensively uses physical, chemical and biological treatment methods to remove various pollutants in the wastewater in stages and in a targeted manner, so as to achieve standard discharge, protect the ecological environment and public health.

[0004] The above-mentioned related technologies have the following defects: medical wastewater usually contains blood, tissue fragments, cells, patient secretions and excretions, etc. These substances will form suspended matter in the wastewater, which also contains a large number of pathogens. After the general wastewater treatment system places the disinfection system at the end, although these suspended matter are separated in the early stage, they are not disinfected, which affects the thoroughness of the treatment of medical wastewater. In addition, the commonly used high-efficiency disinfectant chlorine dioxide destroys the cell wall and cell membrane of microorganisms through oxidation during disinfection, and its debris may also be converted into suspended matter, resulting in the need for secondary treatment of the disinfected wastewater. At the same time, there will be residues and byproducts after chlorine dioxide disinfection, which also affects the treatment efficiency and quality of medical wastewater. Summary of the invention

[0005] In order to improve the problem that suspended solids in wastewater are not disinfected and disinfectants are easily left after disinfection in existing medical wastewater treatment systems, the present application provides an environmentally friendly medical wastewater treatment device and method.

[0006] The first aspect of the present application provides a medical wastewater environmental protection treatment device adopts the following technical solution: A medical wastewater environmental treatment device comprises a physical treatment unit, a chemical treatment unit and a biological treatment unit connected in sequence, wherein the physical treatment unit comprises: a processing box, the output end of which is connected to the chemical processing unit; A filter barrel is rotatably installed in the treatment box, and its rotation axis is parallel to the horizontal plane. The filter barrel has a plurality of filter holes only on the arc-surface outer peripheral wall, and a first opening and a second opening are respectively provided in the middle of both ends. One axial end of the filter barrel is provided with a transparent panel and the first opening is provided on the transparent panel. A first ultraviolet lamp is arranged in the processing box, and its illumination direction corresponds to the transparent panel; A scraping mechanism is provided in the treatment box and is used to scrape off the suspended matter adhering to the inner peripheral wall of the curved surface of the filter barrel when the water level in the filter barrel rises to a set value; a driving mechanism for driving the filter barrel to rotate in the processing box; and A pre-disinfection tank, wherein the input end of the pre-disinfection tank is connected to the wastewater source, and the output end is connected to a water supply pipe with a free end extending from the first opening to the filter barrel; the pre-disinfection tank is provided with a chlorine dioxide disinfection system for disinfecting the wastewater in the pre-disinfection tank.

[0007] Furthermore, the radius of the filter barrel is not less than twice the axial width of the filter barrel.

[0008] Furthermore, a filter layer that completely covers all the filter holes is attached to the inner peripheral wall of the curved surface of the filter barrel.

[0009] Furthermore, a plurality of spoiler strips radially arranged along the filter barrel are integrally formed on a side of the transparent panel facing away from the first ultraviolet lamp.

[0010] Furthermore, the scraping mechanism comprises: A central axis is coaxially arranged with the filter barrel and one end of the central axis extends from the second opening into the filter barrel; A control rod is arranged radially along the filter barrel and is lifted and slidably arranged on the central axis, and the control rod is located in the filter barrel; A scraper cover is fixedly connected to the upper end of the control rod and arranged along the axial direction of the filter barrel, and one side of the two sides is a high side and the other side is a low side, and the rotation direction of the filter barrel is from the low side of the scraper cover to the high side of the scraper cover; a slag conveying pipe, connected to one end of the scraper cover close to the second opening and extending to the outside of the filter barrel; and The liquid level assembly is used to monitor the water level in the filter barrel and drive the control rod to move up to the high side of the scraper cover to contact the inner peripheral wall of the filter barrel arc surface when the water level in the filter barrel reaches a set value.

[0011] Furthermore, the liquid level component comprises: A floating ball is fixedly connected to the bottom end of the control rod, and when the high side of the scraper cover contacts the inner peripheral wall of the filter barrel arc surface, the floating ball does not exceed the lowest edge of the first opening.

[0012] Furthermore, a guide cylinder is fixedly connected to the central axis and radially penetrates the central axis, and the control rod is slidably arranged in the guide cylinder. An end of the central axis close to the first opening is fixedly connected to a water retaining plate coaxially arranged with the filter barrel, and the outer diameter of the water retaining plate is larger than the outer diameter of the second opening.

[0013] Furthermore, a hollow portion is provided in the central axis, the slag conveying pipe is provided as a hose and passes through the hollow portion, and a negative pressure suction device is connected to one end of the slag conveying pipe away from the slag scraping cover.

[0014] Furthermore, a delivery pipe and a delivery pump are connected to the bottom of the processing box, the delivery pipe is connected to a transparent spiral coil, a second ultraviolet lamp is arranged along its spiral axis at the central axis of the transparent spiral coil, the bottom end of the transparent spiral coil is connected to the delivery pipe, and the top end is connected to the chemical treatment unit.

[0015] The second aspect of the present application provides an environmentally friendly method for treating medical wastewater using the following technical solution: A method for environmentally friendly treatment of medical wastewater, based on the above-mentioned environmentally friendly treatment device for medical wastewater, comprises the following steps: S1. The medical wastewater is transported to the pre-disinfection tank, and the wastewater is pre-disinfected for a certain period of time by the chlorine dioxide disinfection system to obtain first-stage treated wastewater; S2. The first-stage treated sewage is transported to the filter barrel through the water supply pipe, the filter barrel is driven to rotate and the first ultraviolet lamp is turned on, the first-stage treated sewage is filtered to obtain second-stage treated sewage when the filter barrel rotates, and the suspended matter in the first-stage treated sewage adheres to the inner circumferential wall of the curved surface of the filter barrel under the action of centrifugal force; S3. The secondary treated sewage is subjected to secondary disinfection under the irradiation of the first ultraviolet lamp and the residual chlorine dioxide and its by-products are decomposed, and the suspended matter adhering to the inner peripheral wall of the arc surface of the filter barrel is disinfected under the irradiation of the first ultraviolet lamp; S4. When there are many suspended solids adhering to the inner circumferential wall of the filter barrel arc surface, causing the sewage level in the filter barrel to rise to a set value, the scraping mechanism is activated to scrape off the suspended solids adhering to the inner circumferential wall of the filter barrel arc surface, thereby promoting the discharge of sewage in the filter barrel; S5. The secondary treated wastewater discharged from the filter barrel enters the treatment tank and is sequentially transported to the chemical treatment unit and the biological treatment unit for subsequent treatment.

[0016] In summary, the beneficial technical effects of this application are: 1. After the chlorine dioxide disinfection system in the pre-disinfection tank pre-disinfects the medical wastewater, it is transported to the filter barrel through the water supply pipe. After the filter barrel is driven to rotate by the driving mechanism and the first ultraviolet lamp is turned on, the filter barrel filters the first-order treated sewage while rotating at high speed. The sewage passing through the filter holes of the filter barrel enters the treatment box to form second-order treated sewage, while the suspended matter in the first-order treated sewage adheres to the inner circumferential wall of the curved surface of the filter barrel under the action of centrifugal force to slow down the filtration process, which can avoid a large amount of first-order treated sewage being filtered too early and resulting in too short a residence time in the filter barrel, and at the same time ensure the penetration rate of ultraviolet light in the first-order treated sewage; 2. When the first ultraviolet lamp is turned on, the ultraviolet light it emits passes through the transparent panel and shines on the first-stage treated sewage in the filter barrel and the suspended matter adhering to the curved inner wall of the filter barrel, which can fully disinfect the medical wastewater and its suspended matter without the need for secondary disinfection of the filtered suspended matter; and because the ultraviolet light disinfection method is coordinated with the chlorine dioxide disinfection system in the pre-disinfection tank, it can more comprehensively disinfect pathogens and bacteria in the medical sewage, and can also reduce the amount of chlorine dioxide used in the chlorine dioxide disinfection system to a certain extent. In addition, the ultraviolet light emitted by the first ultraviolet lamp can also decompose the residual chlorine dioxide in the first-stage treated sewage and the by-products after chlorine dioxide disinfection, further reducing the disinfection residue and improving the cleanliness of the treated sewage; 3. When a large amount of suspended matter adheres to the inner circumference of the curved surface of the filter barrel, the discharge amount of the first-stage treated sewage from the filter barrel decreases, while the amount of the first-stage treated sewage transported to the filter barrel by the water inlet pipe remains unchanged, resulting in an increase in the water level in the filter barrel, which is convenient for more thorough ultraviolet disinfection of the first-stage treated sewage in the filter barrel and more thorough disinfection of the suspended matter adhering to the inner circumference of the curved surface of the filter barrel. Once the water level in the filter barrel rises to the set value, the float drives the scraper cover to press against the filter layer through the control rod to scrape off the suspended matter adhering to the inner circumference of the curved surface of the filter barrel. At this time, the first-stage treated sewage that has been disinfected by ultraviolet light is discharged from the filter barrel, and the suspended matter that has been disinfected by ultraviolet light is also scraped off. The filter barrel continues to treat the first-stage treated sewage that is continuously introduced. Such a cycle can achieve continuous disinfection and filtration of the first-stage treated sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a schematic cross-sectional structural diagram of a processing box according to an embodiment of the present application; Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A; Figure 4 It is a schematic cross-sectional structure diagram mainly used to show the cross section of the scraper cover in the embodiment of the present application; Figure 5 yes Figure 2 A partial enlarged schematic diagram of part B.

[0018] Description of reference numerals: 11. Chemical treatment unit; 12. Biological treatment unit; 2. Processing box; 21. Delivery pipe; 22. Delivery pump; 23. Transparent spiral coil; 3. filter barrel; 31. first opening; 32. second opening; 33. transparent panel; 331. spoiler strip; 34. filter layer; 41. a first ultraviolet lamp; 42. a second ultraviolet lamp; 5. Pre-disinfection tank; 51. Water supply pipe; 52. Chlorine dioxide disinfectant adding device; 53. Stirring device; 61. Central axis; 611. Hollow part; 62. Control rod; 63. Slag scraper; 631. High side; 632. Low side; 64. Slag conveying pipe; 65. Float; 66. Guide cylinder; 67. Water retaining plate; 68. Negative pressure suction device; 71. Transmission wheel; 72. Driving wheel; 73. Driving motor. DETAILED DESCRIPTION

[0019] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] The present application embodiment discloses a medical wastewater environmental protection treatment device. Figure 1 , Figure 2 and Figure 3 , which includes a physical treatment unit, a chemical treatment unit 11 and a biological treatment unit 12 connected in sequence, and the physical treatment unit includes: The processing box 2 has an output end connected to the chemical processing unit 11 .

[0021] The filter barrel 3 is rotatably installed in the treatment box 2, and its rotation axis is parallel to the horizontal plane. The filter barrel 3 is only provided with a plurality of filter holes on the arc-surface outer wall, and a first opening 31 and a second opening 32 are respectively provided in the middle of both ends. One axial end of the filter barrel 3 is provided with a transparent panel 33, and the first opening 31 is provided on the transparent panel 33. Specifically, the transparent panel 33 is made of high borosilicate glass, and the rest of the filter barrel 3 is made of stainless steel. In order to improve the stability of the transparent panel 33 on the filter barrel 3, a support frame is provided on one side of the transparent panel 33 of the filter barrel 3 to structurally strengthen the transparent panel 33.

[0022] The first ultraviolet lamp 41 is arranged in the processing box 2, and its lighting direction corresponds to the transparent panel 33. In the specific configuration, the first ultraviolet lamp 41 is provided in plurality and arranged in a ring shape or arranged radially along the filter barrel 3 and distributed in an array with equal spacing along the axis of the filter barrel 3.

[0023] The scraping mechanism is arranged in the processing box 2, and is used for scraping off the suspended matter adhered to the inner peripheral wall of the curved surface of the filter barrel 3 when the water level in the filter barrel 3 rises to a set value.

[0024] The driving mechanism is used to drive the filter barrel 3 to rotate at a high speed in the treatment box 2 with the axis of the filter barrel 3 as the rotation axis. A pre-disinfection tank 5, the input end of which is connected to a wastewater source, and the output end of which is connected to a water supply pipe 51 whose free end extends from a first opening 31 to the filter barrel 3; a chlorine dioxide disinfection system for disinfecting the wastewater in the pre-disinfection tank 5 is provided in the pre-disinfection tank 5, specifically, the chlorine dioxide disinfection system comprises a chlorine dioxide disinfectant adding device 52 and a stirring device 53 which are arranged on the disinfection tank, the chlorine dioxide disinfectant adding device 52 and the stirring device 53 are both conventional technologies and will not be described in detail here.

[0025] Therefore, when treating medical waste water, solid waste in the medical waste water is first filtered out, and then the treated medical waste water is passed into the pre-disinfection tank 5, and a set amount of chlorine dioxide disinfectant is passed into the pre-disinfection tank 5 through the chlorine dioxide disinfectant adding device 52, and then stirred with the help of the stirring device 53 to accelerate the mixing uniformity of the medical waste water and the chlorine dioxide disinfectant. In order to improve the disinfection efficiency of the chlorine dioxide disinfectant, a constant temperature heating device can also be set in the pre-disinfection tank 5 to maintain the temperature in the pre-disinfection tank 5 at the optimal reaction temperature of 20°C to 40°C.

[0026] After the pre-disinfection in the pre-disinfection tank 5 is completed, the first-order treated sewage is obtained. Since the disinfection of medical sewage by chlorine dioxide disinfectant is mainly to destroy the cell wall and cell membrane of microorganisms, the first-order treated sewage still contains a certain amount of suspended matter, and there is also a small amount of chlorine dioxide residue and disinfected byproducts, such as chlorate and chlorite. At this time, the first-order treated sewage is transported to the filter barrel 3 through the water supply pipe 51. After the filter barrel 3 is driven to rotate by the driving mechanism and the first ultraviolet lamp 41 is turned on, the filter barrel 3 is rotated at a high speed to filter the first-order treated sewage. The sewage passing through the filter hole of the filter barrel 3 enters the treatment box 2 to form the second-order treated sewage, and the suspended matter in the first-order treated sewage adheres to the inner circumferential wall of the curved surface of the filter barrel 3 under the action of centrifugal force to slow down the filtration process, which can avoid a large amount of first-order treated sewage from being filtered too early and causing the residence time in the filter barrel 3 to be too short, and at the same time, the penetration rate of ultraviolet light in the first-order treated sewage can be ensured.

[0027] Since the first ultraviolet lamp 41 is turned on, the ultraviolet light emitted by it passes through the transparent panel 33 and irradiates the first-stage treated sewage in the filter barrel 3 and the suspended matter adhering to the inner wall of the curved surface of the filter barrel 3, which can disinfect the two, and there is no need to perform secondary disinfection on the filtered suspended matter; and since the disinfection method of ultraviolet light is to kill or inhibit the activity of pathogens by destroying their DNA or RNA structure, it can cooperate with the chlorine dioxide disinfection system in the pre-disinfection tank 5 to perform a more comprehensive disinfection of pathogens and bacteria in medical sewage, and can also reduce the use of chlorine dioxide in the chlorine dioxide disinfection system to a certain extent. In addition, the ultraviolet light irradiated by the first ultraviolet lamp 41 can also decompose the residual chlorine dioxide in the first-stage treated sewage and the by-products after chlorine dioxide disinfection, further reducing the disinfection residue and improving the cleanliness of the treated sewage.

[0028] When more suspended matter adheres to the inner circumference of the curved surface of the filter barrel 3, the discharge amount of the first-order treated sewage from the filter barrel 3 decreases, while the amount of the first-order treated sewage transported by the water inlet pipe to the filter barrel 3 remains unchanged, resulting in a rise in the water level in the filter barrel 3, which is convenient for more sufficient ultraviolet disinfection of the first-order treated sewage in the filter barrel 3 and more sufficient disinfection of the suspended matter adhered to the inner circumference of the curved surface of the filter barrel 3. Once the water level in the filter barrel 3 rises to the set value, the scraping mechanism starts and scrapes off the suspended matter adhered to the inner circumference of the curved surface of the filter barrel 3. At this time, the first-order treated sewage that has been disinfected by ultraviolet light is discharged from the filter barrel 3, and the suspended matter that has been disinfected by ultraviolet light is also scraped off, and the filter barrel 3 continues to treat the first-order treated sewage that continues to flow in.

[0029] Specifically, to ensure the disinfection quality of the first-stage treated sewage in filter tank 3, refer to Figure 2 The radius of the filter barrel 3 is not less than twice the axial width of the filter barrel 3. The side of the transparent panel 33 facing away from the first ultraviolet lamp 41 is integrally formed with a plurality of spoiler strips 331 arranged radially along the filter barrel 3, and a filter layer 34 that completely covers all filter holes is attached to the inner circumferential wall of the curved surface of the filter barrel 3. The scraping mechanism is used to scrape off the suspended matter adhered to the filter layer 34. The filter layer 34 can be a filter cloth, a filter mesh, etc., which can be replaced in time after wear, which can reduce the use cost of the filter barrel 3.

[0030] Therefore, by setting the shape of the filter barrel 3 and the disturbance effect of the plurality of spoiler strips 331 on the first-stage treated sewage when rotating with the filter barrel 3, the irradiated area of ​​the first-stage treated sewage in the filter barrel 3 and the ultraviolet light irradiated by the first ultraviolet lamp 41 can be greatly increased, ensuring the ultraviolet disinfection effect of the first ultraviolet lamp 41. The filter layer 34, as a consumable part, can be easily replaced when it is worn, which improves the maintenance convenience of the treatment device of the present application.

[0031] Specifically, refer to Figure 2 , Figure 3 and Figure 4 The above-mentioned scraping mechanism includes: The middle axis 61 is coaxially arranged with the filter barrel 3 and one end of the middle axis 61 extends from the second opening 32 into the filter barrel 3; The control rod 62 is arranged along the radial direction of the filter barrel 3 and is vertically lifted and slidably arranged on the central axis 61. The control rod 62 is located in the filter barrel 3; The scraper cover 63 is fixedly connected to the upper end of the control rod 62 and is axially arranged along the filter barrel 3. Its upper end is open and points to the uppermost end of the arc-surface inner wall of the filter barrel 3. One side of the scraper cover 63 is a high side 631 and the other side is a low side 632. The rotation direction of the filter barrel 3 is from the low side 632 of the scraper cover 63 to the high side 631 of the scraper cover 63.

[0032] The slag conveying pipe 64 is connected to one end of the scraper cover 63 near the second opening 32 and extends to the outside of the filter barrel 3. The bottom of the scraper cover 63 is arranged from high to low in the direction from the first opening 31 to the second opening 32, so that the suspended matter scraped off the filter layer 34 by the high side 631 of the scraper cover 63 can slide smoothly along the inclined surface of the bottom of the scraper cover 63 into the slag conveying pipe 64. In addition, the cross section of the control rod 62 is C-shaped and its opening side is arranged away from the first opening 31, so that the slag conveying pipe 64 can be directly embedded in its opening groove, thereby reducing the space occupied by the control rod 62 and the slag conveying pipe 64 in the filter barrel 3. And The liquid level assembly is used to monitor the water level in the filter barrel 3 and drive the control rod 62 to move up to the high side 631 of the scraper cover 63 to contact the inner circumferential wall of the curved surface of the filter barrel 3 when the water level in the filter barrel 3 reaches a set value.

[0033] Among them, refer to Figure 2 and Figure 5 , the liquid level components include: The float 65 is fixed to the bottom end of the control rod 62, and when the high side 631 of the scraper cover 63 contacts the filter layer 34 on the curved inner wall of the filter barrel 3, the low side 632 of the scraper cover 63 is spaced apart from the filter layer 34, and the float 65 does not exceed the lowest edge of the first opening 31.

[0034] At the same time, the central axis 61 is fixedly connected with a guide cylinder 66 which is radially arranged therethrough, and the control rod 62 is slidably arranged in the guide cylinder 66, and the control rod 62 is a square tube to prevent the control rod 62 from rotating in the guide cylinder 66 and affecting the scraping effect of the scraper cover 63. The end of the central axis 61 close to the first opening 31 is fixedly connected with a water retaining plate 67 which is coaxially arranged with the filter barrel 3, and the outer diameter of the water retaining plate 67 is larger than the outer diameter of the second opening 32; and the central axis 61 is provided with a hollow part 611, and the slag conveying pipe 64 is provided as a hose and is arranged in the hollow part 611, and the end of the slag conveying pipe 64 which is away from the scraper cover 63 is connected with a negative pressure suction device 68.

[0035] In this way, when the water supply pipe 51 inputs the first-order treated sewage from the first opening 31 of the filter barrel 3, the first-order treated sewage impacts the water retaining plate 67 and is dispersed to the axial direction of the filter barrel 3, which facilitates the first-order treated sewage in the filter barrel 3 to rotate as a whole when the filter barrel 3 rotates, and also prevents the untreated first-order treated sewage from being directly discharged in large quantities from the second opening 32. When the water level of the first-order treated sewage in the filter barrel 3 rises, the float 65 also floats up, and can push the control rod 62 to move up in the guide cylinder 66, so that the high side 631 of the scraper cover 63 contacts the filter layer 34 on the inner peripheral wall of the curved surface of the filter barrel 3. As the filter barrel 3 continues to rotate, the suspended matter attached to the filter layer 34 passes over the low side 632 of the scraper cover 63 and is scraped off by the high side 631 of the scraper cover 63 and falls on the bottom side of the scraper cover 63, and slides along the inclined surface on the bottom side of the scraper cover 63 to the slag conveying pipe 64 and is discharged from the filter barrel 3. If necessary, the negative pressure suction device 68 can also be turned on to perform negative pressure suction on the suspended matter accumulated in the scraper cover 63 to improve the cleaning efficiency of the suspended matter adhered to the filter barrel 3.

[0036] After the scraper cover 63 scrapes off the suspended matter on the inner peripheral wall of the curved surface of the filter barrel 3, the first-stage treated sewage in the filter barrel 3 passes through the filter holes under the high-speed rotation of the filter barrel 3 and enters the treatment box 2; and as the water supply pipe 51 continues to pass the first-stage treated sewage containing suspended matter, the filter holes on the filter barrel 3 are gradually closed, and such a cycle can realize continuous disinfection and filtration treatment of the first-stage treated sewage.

[0037] In order to avoid the suspended matter attached to the filter layer 34 of the filter barrel 3 in the initial period after treatment, the first-stage treated sewage introduced into the water supply pipe 51 is directly filtered only, and the ultraviolet light disinfection time of the first ultraviolet lamp 41 is short, which affects the secondary disinfection and residue decomposition effect.

[0038] Further, see Figure 1 A delivery pipe 21 and a delivery pump 22 are also connected to the bottom of the processing box 2, the delivery pipe 21 is connected to a transparent spiral coil 23, a second ultraviolet lamp 42 is arranged along its spiral axis at the axis 61 of the transparent spiral coil 23, the bottom end of the transparent spiral coil 23 is connected to the delivery pipe 21, the top end is connected to the chemical treatment unit 11, and a light shield is provided on the outside of the transparent spiral coil 23 (not shown in the figure).

[0039] In this way, even if part of the first-stage treated water is disinfected by the ultraviolet light irradiated by the first ultraviolet lamp 41 in the filter barrel 3 for a short time, under the action of the delivery pump 22, the filtered second-stage treated sewage in the treatment box 2 will be transported from bottom to top to the transparent spiral coil 23, and irradiated by the second ultraviolet lamp 42 for ultraviolet light disinfection. Similarly, secondary disinfection and decomposition of residual chlorine dioxide and by-products after chlorine dioxide disinfection can be ensured, thereby ensuring the cleanliness of the treated sewage as much as possible.

[0040] In addition, refer to Figure 2 The filter barrel 3 is provided with one end of the second opening 32 and is rotatably mounted on the outer peripheral wall of the central axis 61. The transparent panel 33 is rotatably mounted on the outer peripheral wall of the water supply pipe 51. The driving mechanism is configured as a transmission wheel 71 coaxially fixed to one end of the filter barrel 3 with the second opening 32. A driving wheel 72 and a driving motor 73 for driving the driving wheel 72 to rotate are rotatably mounted outside the treatment box 2. The driving wheel 72 and the transmission wheel 71 can be sprockets or pulleys, or synchronous wheels, and the two are connected by a chain or belt, or a synchronous belt.

[0041] This can greatly ensure the stability of the filter barrel 3 during high-speed rotation, and will not cause significant interference to the ultraviolet light irradiation of the first ultraviolet lamp 41, so as to ensure a stable filtering effect on the first-stage treated sewage.

[0042] Furthermore, the inner wall of the treatment box 2 is also configured to be a round cake shape that matches the outer shape of the filter barrel 3, and a reflective layer is attached to the curved inner wall and inner end wall of the treatment box 2 to ensure that the ultraviolet light irradiated by the first ultraviolet lamp 41 can be reflected by the reflective layer to ensure effective disinfection of the filter layer 34.

[0043] The present application embodiment discloses a method for environmentally friendly treatment of medical wastewater, based on the above-mentioned medical wastewater environmentally friendly treatment device, referring to Figure 1 and Figure 2 , which comprises the following steps: S1. The medical wastewater is transported to the pre-disinfection tank 5, and the wastewater is pre-disinfected for a certain period of time by a chlorine dioxide disinfection system to obtain a first-stage treated sewage; S2. The first-stage treated sewage is transported to the filter barrel 3 through the water supply pipe 51, the filter barrel 3 is driven to rotate and the first ultraviolet lamp 41 is turned on. When the filter barrel 3 rotates, the first-stage treated sewage is filtered to obtain the second-stage treated sewage. The suspended matter in the first-stage treated sewage adheres to the inner circumferential wall of the curved surface of the filter barrel 3 under the action of centrifugal force; S3. The secondary treated sewage is disinfected under the first ultraviolet lamp 41 for secondary disinfection and the decomposition of residual chlorine dioxide and its byproducts, and the suspended matter adhering to the inner wall of the curved surface of the filter barrel 3 is disinfected under the first ultraviolet lamp 41; S4. When there are many suspended solids adhering to the inner circumferential wall of the filter barrel 3 and the sewage level in the filter barrel 3 rises to a set value, the scraping mechanism starts and scrapes off the suspended solids adhering to the inner circumferential wall of the filter barrel 3 to promote the discharge of sewage in the filter barrel 3; S5. The secondary treated sewage discharged from the filter barrel 3 enters the treatment box 2, and is transported from bottom to top to the transparent spiral coil 23 by the action of the delivery pump 22, and is irradiated with ultraviolet light by the second ultraviolet lamp 42 for additional disinfection, and is then transported in turn to the chemical treatment unit 11 and the biological treatment unit 12 for subsequent treatment.

[0044] The implementation principle of the medical wastewater environmental protection treatment device in the embodiment of the present application is: After the chlorine dioxide disinfection system in the pre-disinfection tank 5 pre-disinfects the medical waste water, it is transported to the filter barrel 3 through the water supply pipe 51. After the filter barrel 3 is driven to rotate by the driving mechanism and the first ultraviolet lamp 41 is turned on, the filter barrel 3 filters the first-order treated sewage when it rotates at high speed, and the sewage passing through the filter holes of the filter barrel 3 enters the treatment box 2 to form second-order treated sewage, while the suspended matter in the first-order treated sewage adheres to the curved inner wall of the filter barrel 3 under the action of centrifugal force to slow down the filtration process, which can avoid a large amount of first-order treated sewage from being filtered prematurely and resulting in too short a residence time in the filter barrel 3, and at the same time ensure the penetration rate of ultraviolet light in the first-order treated sewage.

[0045] Since the first ultraviolet lamp 41 is turned on, the ultraviolet light emitted by it passes through the transparent panel 33 and irradiates the first-stage treated sewage in the filter barrel 3 and the suspended matter adhering to the inner wall of the curved surface of the filter barrel 3, which can disinfect the two, and there is no need to perform secondary disinfection on the filtered suspended matter; and since the disinfection method of ultraviolet light is to kill or inhibit the activity of pathogens by destroying their DNA or RNA structure, it can cooperate with the chlorine dioxide disinfection system in the pre-disinfection tank 5 to perform a more comprehensive disinfection of pathogens and bacteria in medical sewage, and can also reduce the use of chlorine dioxide in the chlorine dioxide disinfection system to a certain extent. In addition, the ultraviolet light irradiated by the first ultraviolet lamp 41 can also decompose the residual chlorine dioxide in the first-stage treated sewage and the by-products after chlorine dioxide disinfection, further reducing the disinfection residue and improving the cleanliness of the treated sewage.

[0046] When more suspended matter adheres to the inner circumference of the curved surface of the filter barrel 3, the discharge amount of the first-order treated sewage from the filter barrel 3 decreases, while the amount of the first-order treated sewage transported by the water inlet pipe to the filter barrel 3 remains unchanged, resulting in a rise in the water level in the filter barrel 3, which is convenient for more sufficient ultraviolet disinfection of the first-order treated sewage in the filter barrel 3 and more sufficient disinfection of the suspended matter adhered to the inner circumference of the curved surface of the filter barrel 3. Once the water level in the filter barrel 3 rises to the set value, the floating ball 65 drives the scraper cover 63 to press against the filter layer 34 through the control rod 62 to scrape off the suspended matter adhered to the inner circumference of the curved surface of the filter barrel 3. At this time, the first-order treated sewage that has been disinfected by ultraviolet light is discharged from the filter barrel 3, and the suspended matter that has been disinfected by ultraviolet light is also scraped off. The filter barrel 3 continues to treat the first-order treated sewage that is continuously introduced, and such a cycle can achieve continuous disinfection and filtration of the first-order treated sewage.

[0047] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A medical wastewater environmental treatment device, comprising a physical treatment unit, a chemical treatment unit (11) and a biological treatment unit (12) connected in sequence, characterized in that: The physical processing unit comprises: A processing box (2), the output end of which is connected to the chemical processing unit (11); A filter barrel (3) is rotatably mounted in the treatment box (2), and its rotation axis is parallel to a horizontal plane. The filter barrel (3) has a plurality of filter holes only on its arc-surface outer peripheral wall, and a first opening (31) and a second opening (32) are respectively provided in the middle of both ends. One axial end of the filter barrel (3) is provided with a transparent panel (33), and the first opening (31) is provided on the transparent panel (33); A first ultraviolet lamp (41) is arranged in the processing box (2), and its illumination direction is arranged corresponding to the transparent panel (33); A scraping mechanism is provided in the processing box (2) and is used to scrape off the suspended matter adhering to the inner peripheral wall of the curved surface of the filter barrel (3) when the water level in the filter barrel (3) rises to a set value; a driving mechanism, used for driving the filter barrel (3) to rotate in the processing box (2); and A pre-disinfection tank (5), wherein the input end of the pre-disinfection tank (5) is connected to a wastewater source, and the output end is connected to a water supply pipe (51) whose free end extends from the first opening (31) to the filter barrel (3); the pre-disinfection tank (5) is provided with a chlorine dioxide disinfection system for disinfecting the wastewater in the pre-disinfection tank (5).

2. The medical wastewater environmental protection treatment device according to claim 1 is characterized in that: The radius of the filter barrel (3) is not less than twice the axial width of the filter barrel (3).

3. The medical wastewater environmental protection treatment device according to claim 1 is characterized in that: A filter layer (34) that completely covers all the filter holes is attached to the curved inner wall of the filter barrel (3).

4. The medical wastewater environmental protection treatment device according to claim 1 is characterized in that: A plurality of spoiler strips (331) arranged radially along the filter barrel (3) are integrally formed on a side of the transparent panel (33) facing away from the first ultraviolet lamp (41).

5. The medical wastewater environmental protection treatment device according to any one of claims 1 to 4, characterized in that: The scraping mechanism comprises: A central axis (61) is coaxially arranged with the filter barrel (3) and one end of which extends from the second opening (32) into the filter barrel (3); A control rod (62) is arranged radially along the filter barrel (3) and is lifted and slidably arranged on the central axis (61), and the control rod (62) is located in the filter barrel (3); A scraper cover (63) is fixedly connected to the upper end of the control rod (62) and is arranged along the axial direction of the filter barrel (3), and one side of the two sides is a high side (631) and the other side is a low side (632), and the rotation direction of the filter barrel (3) is from the low side (632) of the scraper cover (63) to the high side (631) of the scraper cover (63); a slag conveying pipe (64), connected to an end of the slag scraping cover (63) close to the second opening (32) and extending to the outside of the filter barrel (3); and The liquid level assembly is used to monitor the water level in the filter barrel (3) and, when the water level in the filter barrel (3) reaches a set value, drives the control rod (62) to move upward to the high side (631) of the scraper cover (63) to contact the inner circumferential wall of the curved surface of the filter barrel (3).

6. The medical wastewater environmental protection treatment device according to claim 5 is characterized in that: The liquid level assembly comprises: The floating ball (65) is fixedly connected to the bottom end of the control rod (62), and when the high side (631) of the scraper cover (63) contacts the arc-surface inner peripheral wall of the filter barrel (3), the floating ball (65) does not exceed the lowest edge of the first opening (31).

7. The medical wastewater environmental protection treatment device according to claim 5 is characterized in that: A guide cylinder (66) is fixedly connected to the central axis (61) and is radially arranged therethrough. The control rod (62) is slidably arranged in the guide cylinder (66). An end of the central axis (61) close to the first opening (31) is fixedly connected to a water retaining plate (67) coaxially arranged with the filter barrel (3). The outer diameter of the water retaining plate (67) is larger than the outer diameter of the second opening (32).

8. The medical wastewater environmental protection treatment device according to claim 5 is characterized in that: A hollow portion (611) is provided in the central axis (61), the slag conveying pipe (64) is provided as a hose and passes through the hollow portion (611), and one end of the slag conveying pipe (64) facing away from the slag scraping cover (63) is connected to a negative pressure suction device (68).

9. The medical wastewater environmental protection treatment device according to claim 1 is characterized in that: The bottom of the treatment box (2) is connected to a delivery pipe (21) and a delivery pump (22); the delivery pipe (21) is connected to a transparent spiral coil (23); a second ultraviolet lamp (42) is arranged along the spiral axis of the transparent spiral coil (23) at the center axis (61); the bottom end of the transparent spiral coil (23) is connected to the delivery pipe (21), and the top end is connected to the chemical treatment unit (11).

10. A method for environmentally friendly treatment of medical wastewater, based on the environmentally friendly treatment device for medical wastewater according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. The medical wastewater is transported to the pre-disinfection tank (5), and the wastewater is pre-disinfected for a certain period of time by the chlorine dioxide disinfection system to obtain first-stage treated wastewater; S2. The first-stage treated sewage is transported to the filter barrel (3) through the water supply pipe (51), the filter barrel (3) is driven to rotate and the first ultraviolet lamp (41) is turned on, the first-stage treated sewage is filtered to obtain second-stage treated sewage when the filter barrel (3) rotates, and the suspended matter in the first-stage treated sewage adheres to the inner circumferential wall of the curved surface of the filter barrel (3) under the action of centrifugal force; S3. The secondary treated sewage is subjected to secondary disinfection under the irradiation of the first ultraviolet lamp (41) and the residual chlorine dioxide and its by-products are decomposed, and the suspended matter adhering to the inner peripheral wall of the curved surface of the filter barrel (3) is disinfected under the irradiation of the first ultraviolet lamp (41); S4. When there are a lot of suspended matter adhering to the inner circumferential wall of the curved surface of the filter barrel (3) and the sewage level in the filter barrel (3) rises to a set value, the scraping mechanism is activated to scrape off the suspended matter adhering to the inner circumferential wall of the curved surface of the filter barrel (3), thereby promoting the discharge of sewage in the filter barrel (3); S5. The secondary treated wastewater discharged from the filter barrel (3) enters the treatment tank (2) and is sequentially transported to the chemical treatment unit (11) and the biological treatment unit (12) for subsequent treatment.

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