Multi-stage sewage treatment equipment and sewage treatment process thereof

Abstract

The invention discloses multistage sewage treatment equipment and a sewage treatment process thereof.The equipment comprises a treatment box, the interior of the treatment box is sequentially divided into a stirring chamber, a roller filtering chamber, an aeration filtering chamber and an ultraviolet disinfection chamber through a plurality of partition plates, a high-pressure washing system is arranged on the outer side face, and an ultraviolet lamp and a reflective mirror are installed in the ultraviolet disinfection chamber; the stirring chamber is used for performing stirring pretreatment on sewage, the roller filtering chamber realizes multi-stage filtering through a filtering basket and a roller, and the high-pressure flushing system can automatically clean the roller; the aeration filter chamber performs aeration biochemical treatment through an aeration pipe and a second filter plate; the ultraviolet disinfection chamber is used for performing multi-angle irradiation disinfection on the sewage by utilizing an ultraviolet lamp and a reflective mirror; through the design of multi-stage filtration, automatic cleaning, efficient disinfection and the like, the sewage treatment effect and efficiency are remarkably improved, and the sewage treatment device has the advantages of being compact in structure, low in energy consumption, convenient to operate and the like and is suitable for various sewage treatment scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and specifically to a multi-stage sewage treatment device and its sewage treatment process. Background Art

[0002] A sewage treatment device is an industrial device that can effectively treat domestic sewage, industrial wastewater, etc. in urban areas, preventing sewage and pollutants from directly flowing into water areas, which is of great significance for improving the ecological environment, enhancing the urban grade, and promoting economic development.

[0003] In the technical field of sewage treatment, traditional sewage treatment devices often have many deficiencies. For example, the filtration process is relatively single, making it difficult to effectively classify impurities with different particle sizes in sewage, resulting in low filtration efficiency and poor effluent quality. Moreover, during the use of the filtration device, impurities are likely to adhere to the surface of the filtration components, requiring frequent manual cleaning, which not only increases the operation cost but may also affect the continuous operation of the device. In addition, traditional disinfection methods may have problems of incomplete disinfection and cannot effectively kill pathogenic microorganisms such as bacteria and viruses in water. At the same time, the structural design of some devices is not compact enough, occupying a large area and consuming high energy, having certain limitations in practical applications. Therefore, there is an urgent need for a sewage treatment device and process that can achieve efficient filtration, automatic cleaning, thorough disinfection, and has a compact structure and low energy consumption. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in traditional sewage treatment devices in the above background art, and provide a multi-stage sewage treatment device and its sewage treatment process.

[0005] The present invention achieves the above purpose through the following technical solutions: A multi-stage sewage treatment device includes a treatment tank, and the treatment tank is successively divided into a stirring chamber, a drum filtration chamber, an aeration filtration chamber, and an ultraviolet disinfection chamber by multiple partition plates; a high-pressure flushing system is arranged on the outer side surface of the treatment tank, and the high-pressure flushing system uses high-pressure water to impact the surface of the drum in the drum filtration chamber to wash off the attached impurities; an ultraviolet lamp and a reflector for reflecting the ultraviolet light rays are installed in the ultraviolet disinfection chamber.

[0006] Further, a water inlet pipe is installed on the treatment tank on one side of the stirring chamber, a stirring motor is installed on the top of the stirring chamber, and a stirring rod is connected to the output end of the stirring motor.

[0007] Further, a first partition board is provided between the drum filtration chamber and the stirring chamber. A first water passing opening is formed in the upper part of the first partition board. A filtration basket is installed in the drum filtration chamber on one side of the first partition board. The filtration basket is mounted on the treatment tank through bolts and is in close contact with the first partition board. The bottom surface of the first water passing opening is higher than the basket opening surface of the filtration basket.

[0008] Further, two mounting brackets are provided on the inner bottom surface of the drum filtration chamber. A drum is rotatably arranged between the two mounting brackets. A plurality of first filtration holes are evenly formed in the barrel body of the drum. A first transmission ring is fixedly arranged at the middle position of the outer peripheral surface of the drum. A motor is installed at the top of the drum filtration chamber. A second transmission ring is fixedly connected to the output end of the motor. The second transmission ring and the first transmission ring are in transmission connection through a transmission belt; one end of the drum is closed, and the other end is connected to the aeration filtration chamber in a penetrating manner.

[0009] Further, the high-pressure flushing system includes a flushing water pump. A water outlet pipe and a water suction pipe are connected to the flushing water pump. The water outlet pipe penetrates into the drum filtration chamber. A spray head is connected to one end of the water outlet pipe. The spray head faces the outer surface of the drum; a water tank is installed on the outer side surface of the treatment tank above the water outlet pipe. A second water passing opening communicating with the drum filtration chamber is formed in the side surface of the water tank. A first filter plate is arranged in the water tank above the second water passing opening. The water suction pipe is connected to the water tank above the first filter plate.

[0010] Further, an aeration pipe connected to an external aeration device is arranged in the aeration filtration chamber. A second filter plate is arranged in the aeration filtration chamber above the aeration pipe; a second partition board is provided between the aeration filtration chamber and the ultraviolet disinfection chamber. A third water passing opening is formed in the second partition board above the second filter plate. The third water passing opening communicates with the ultraviolet disinfection chamber.

[0011] Further, an ultraviolet lamp is installed on the side surface of the second partition board close to the ultraviolet disinfection chamber. A light-transmitting waterproof cover is arranged outside the ultraviolet lamp. A reflector is installed on the inner side wall of the ultraviolet disinfection chamber.

[0012] Further, the aperture of the filtration basket > the aperture of the first filtration holes on the barrel body of the drum > the aperture of the filtration holes on the first filter plate.

[0013] Further, a drain pipe is installed on the treatment tank on one side of the ultraviolet disinfection chamber.

[0014] A sewage treatment process:

[0015] S1: Stirring pretreatment: The stirring motor drives the stirring rod to rotate, stir and mix the sewage, and add flocculant agents to preliminarily aggregate the suspended solids in the sewage;

[0016] S2: Multi-stage filtration: The stirred sewage flows into the drum filtration chamber through the first water passing hole above the first partition board. First, it is filtered by the filter basket to intercept larger particle impurities; the filtered sewage enters the drum, and the motor drives the drum to rotate through the transmission belt. The first filter holes on the drum body further filter smaller suspended solids;

[0017] S3: High-pressure flushing: The impurities attached to the surface of the drum are periodically flushed by the high-pressure flushing system. The flushing water pump extracts the clear water filtered by the first filter plate from the water tank, and impacts the surface of the drum with high-pressure water flow through the nozzle. The impurities fall to the bottom of the filter basket or the drum filtration chamber to achieve self-cleaning of the drum;

[0018] S4: Aeration biochemical treatment: The sewage filtered by the drum flows into the aeration filtration chamber from the end of the drum. The aeration pipe is connected to an external aeration device to introduce air into the sewage to promote the decomposition of organic matter by aerobic microorganisms; the aerated sewage passes through the second filter plate to intercept microbial flocs and fine impurities to further purify the water quality;

[0019] S5: Ultraviolet disinfection: The sewage after aeration filtration enters the ultraviolet disinfection chamber through the third water passing hole on the second partition board; the ultraviolet lamp emits ultraviolet rays, and the reflector reflects the light to enhance the disinfection effect, killing pathogenic microorganisms such as bacteria and viruses in the water; the qualified sewage after disinfection is discharged through the drain pipe.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The equipment forms a progressive physical purification process of "coarse filtration → fine filtration → microfiltration" through the filter basket, drum and second filter plate. The filter basket has the largest pore size and can first remove large particle impurities; the first filter holes on the drum have the second largest pore size and can filter medium particle suspended solids; the second filter plate has the smallest pore size and can intercept fine impurities, thereby realizing the classified and effective treatment of impurities with different particle sizes in the sewage, significantly improving the purification effect and making the effluent water quality better.

[0022] 2. The high-pressure flushing system can periodically flush the impurities attached to the surface of the drum. The flushing water pump extracts the clear water filtered by the first filter plate from the water tank, and impacts the surface of the drum with high-pressure water flow through the nozzle, so that the impurities fall to the bottom of the filter basket or the drum filtration chamber, eliminating the need for frequent manual cleaning, realizing the self-cleaning of the drum, not only reducing the operation cost, but also ensuring the continuous and stable operation of the equipment and improving the use efficiency of the equipment.

[0023] 3. The ultraviolet disinfection chamber is equipped with ultraviolet lamps and reflectors. The ultraviolet rays emitted by the ultraviolet lamps can damage the DNA structure of microorganisms, causing them to lose their reproductive ability. The reflectors can reflect light, expanding the irradiation range of ultraviolet rays and ensuring that the water flow is fully exposed to ultraviolet rays, thereby enhancing the disinfection effect and effectively killing pathogenic microorganisms such as bacteria and viruses in the water, ensuring the hygienic safety of the effluent.

[0024] 4. The device integrates multiple treatment links such as stirring pretreatment, multi-stage filtration, aeration biochemical treatment, and ultraviolet disinfection in a treatment tank. Each treatment chamber is reasonably separated by multiple partition plates, with a compact structure and a small footprint. At the same time, the design of each treatment link is reasonable, which can effectively utilize energy and reduce the overall energy consumption of the device. Brief Description of the Drawings

[0025] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0026] Figure 2 is a schematic diagram of the interior of the treatment tank and the drum filtration chamber of the present invention;

[0027] Figure 3 is a structural schematic diagram of the present invention;

[0028] Figure 4 is a structural schematic diagram of the drum in the drum filtration chamber of the present invention.

[0029] In the figure: 1 - treatment tank, 2 - stirring chamber, 3 - drum filtration chamber, 4 - aeration filtration chamber, 5 - ultraviolet disinfection chamber, 6 - high-pressure flushing system, 7 - water inlet pipe, 8 - first partition plate, 9 - filter basket, 10 - second partition plate, 11 - drain pipe, 21 - stirring motor, 22 - stirring rod, 31 - mounting frame, 32 - drum, 33 - first transmission ring, 34 - motor, 35 - second transmission ring, 36 - transmission belt, 41 - second filter plate, 51 - ultraviolet lamp, 52 - reflector, 61 - flushing water pump, 62 - water outlet pipe, 63 - water suction pipe, 64 - nozzle, 65 - water tank, 81 - first water passing port, 101 - third water passing port, 651 - second water passing port, 652 - first filter plate. Detailed Description of the Invention

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0032] Combined with Figures 1 to 4 A multi-stage sewage treatment device as shown, including a treatment tank 1. The treatment tank 1 is successively divided into a stirring chamber 2, a drum filtration chamber 3, an aeration filtration chamber 4, and an ultraviolet disinfection chamber 5 by multiple partition plates; a high-pressure flushing system 6 is provided on the outer side of the treatment tank 1. The high-pressure flushing system 6 uses high-pressure water to impact the surface of the drum in the drum filtration chamber 3 to wash off the attached impurities; an ultraviolet lamp 51 and a reflector 52 for reflecting the light of the ultraviolet lamp 51 are installed in the ultraviolet disinfection chamber 5.

[0033] As Figure 1 shown, a water inlet pipe 7 is installed on the treatment tank 1 on one side of the stirring chamber 2, and a stirring motor 21 is installed on the top of the stirring chamber 2. The output end of the stirring motor 21 is connected with a stirring rod 22; the stirring motor 21 drives the stirring rod 22 to rotate to stir and mix the sewage, and flocculants and other agents can be added as needed to preliminarily aggregate the suspended substances in the sewage.

[0034] A first partition plate 8 is provided between the drum filtration chamber 3 and the stirring chamber 2. A first water passing port 81 is opened in the upper part of the first partition plate 8. A filter basket 9 is installed in the drum filtration chamber 3 on one side of the first partition plate 8. The filter basket 9 is mounted on the treatment tank 1 by bolts and is closely attached to the first partition plate 8. The bottom surface of the first water passing port 81 is higher than the mouth surface of the filter basket 9; the stirred sewage flows into the drum filtration chamber 3 through the first water passing port 81 in the upper part of the first partition plate 8 and is first filtered by the filter basket 9 to intercept larger particulate impurities.

[0035] As Figure 1 and Figure 4As shown in the figure, two mounting brackets 31 are provided on the inner bottom surface of the drum filtration chamber 3. A drum 32 is rotatably provided between the two mounting brackets 31. A plurality of first filtration holes are evenly formed in the barrel body of the drum 32. A first transmission ring 33 is fixedly provided at the middle position of the outer peripheral surface of the drum 32. A motor 34 is installed at the top of the drum filtration chamber 3. The output end of the motor 34 is fixedly connected with a second transmission ring 35. The second transmission ring 35 and the first transmission ring 33 are connected by a transmission belt 36; one end of the drum 32 is closed, and the other end is connected through to the aeration filtration chamber 4; the filtered sewage enters the drum 32, and the motor 34 drives the drum 32 to rotate through the transmission belt 36. The first filtration holes on the barrel body of the drum 32 further filter smaller suspended matters;

[0036] The high-pressure flushing system 6 includes a flushing water pump 61. A water outlet pipe 62 and a water suction pipe 63 are connected to the flushing water pump 61. The water outlet pipe 62 penetrates into the drum filtration chamber 3. One end of the water outlet pipe 62 is connected with a spray head 64, and the spray head 64 faces the outer surface of the drum 32; a water tank 65 is installed on the outer side surface of the treatment tank 1 above the water outlet pipe 62. A second water passing port 651 communicating with the drum filtration chamber 3 is formed on the side surface of the water tank 65. A first filter plate 652 is arranged in the water tank 65 above the second water passing port 651. The water suction pipe 63 is connected to the water tank 65 above the first filter plate 652; the impurities attached to the surface of the drum are periodically flushed by the high-pressure flushing system 6: the flushing water pump 61 extracts the clear water filtered by the first filter plate 652 from the water tank 65, and impacts the surface of the drum with high-pressure water flow through the spray head 64. The impurities fall to the bottom of the filter basket or the drum filtration chamber, realizing self-cleaning of the drum.

[0037] An aeration pipe connected to an external aeration device is arranged in the aeration filtration chamber 4. A second filter plate 41 is arranged in the aeration filtration chamber 4 above the aeration pipe; a second partition plate 10 is arranged between the aeration filtration chamber 4 and the ultraviolet disinfection chamber 5. A third water passing port 101 is formed on the second partition plate 10 above the second filter plate 41. The third water passing port 101 communicates with the ultraviolet disinfection chamber 5; the sewage filtered by the drum flows into the aeration filtration chamber 4 from the end of the drum. The aeration pipe is connected to an external aeration device to introduce air into the sewage to promote the decomposition of organic matters by aerobic microorganisms; the aerated sewage passes through the second filter plate 41 to intercept microbial flocs and fine impurities, further purifying the water quality.

[0038] As Figure 3As shown, an ultraviolet lamp 51 is installed on the side of the second partition 10 close to the ultraviolet disinfection chamber 5. A light-transmitting waterproof cover is arranged outside the ultraviolet lamp 51, and a reflector 52 is installed on the inner side wall of the ultraviolet disinfection chamber 5. A drain pipe 11 is installed on the treatment tank 1 on one side of the ultraviolet disinfection chamber 5. The sewage after aeration and filtration enters the ultraviolet disinfection chamber 5 through the third water passing port 101 on the second partition 10. In the ultraviolet disinfection chamber 5, the 254-nm ultraviolet rays emitted by the ultraviolet lamp 51 are used to destroy the DNA structure of microorganisms, making them lose their reproductive ability. The reflector expands the ultraviolet irradiation range to ensure that the water flow fully contacts the ultraviolet rays, killing pathogenic microorganisms such as bacteria and viruses in the water. The qualified sewage after disinfection is discharged through the drain pipe 11.

[0039] Among them, the filtering basket 9 has the largest pore diameter and first removes large-particle impurities; the first filtering holes of the drum 32 have the second-largest pore diameter and filter medium particles; subsequently, the second filter plate 41 has the smallest pore diameter and intercepts fine suspended substances, forming a progressive physical purification process of "coarse filtration → fine filtration → microfiltration".

[0040] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0041] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-stage sewage treatment device, comprising a treatment tank (1), characterized in that: Inside the treatment tank (1), it is successively divided into a stirring chamber (2), a drum filtration chamber (3), an aeration filtration chamber (4), and an ultraviolet disinfection chamber (5) by multiple partition plates; on the outer side surface of the treatment tank (1), a high-pressure flushing system (6) is provided, and the high-pressure flushing system (6) uses high-pressure water to impact the surface of the drum in the drum filtration chamber (3) to wash off the attached impurities; in the ultraviolet disinfection chamber (5), an ultraviolet lamp (51) and a reflector (52) for reflecting the light of the ultraviolet lamp (51) are installed.

2. The multi-stage sewage treatment equipment according to claim 1, characterized in that: On the treatment tank (1) on one side of the stirring chamber (2), a water inlet pipe (7) is installed, and on the top of the stirring chamber (2), a stirring motor (21) is installed, and the output end of the stirring motor (21) is connected with a stirring rod (22).

3. The multi-stage sewage treatment equipment according to claim 2, characterized in that: A first partition plate (8) is provided between the drum filtration chamber (3) and the stirring chamber (2), a first water passing port (81) is opened in the upper part of the first partition plate (8), a filter basket (9) is installed in the drum filtration chamber (3) on one side of the first partition plate (8), the filter basket (9) is mounted on the treatment tank (1) by bolts, the filter basket (9) is close to the first partition plate (8), and the bottom surface of the first water passing port (81) is higher than the basket mouth surface of the filter basket (9).

4. The multi-stage sewage treatment equipment according to claim 3, wherein: On the inner bottom surface of the drum filtration chamber (3), two mounting brackets (31) are provided, a drum (32) is rotatably provided between the two mounting brackets (31), a plurality of first filtration holes are evenly opened on the barrel body of the drum (32), a first transmission ring (33) is fixedly provided at the middle position of the outer peripheral surface of the drum (32), a motor (34) is installed on the top of the drum filtration chamber (3), the output end of the motor (34) is fixedly connected with a second transmission ring (35), and the second transmission ring (35) and the first transmission ring (33) are in transmission connection through a transmission belt (36); one end of the drum (32) is closed, and the other end is connected through to the inside of the aeration filtration chamber (4).

5. The multi-stage sewage treatment equipment according to claim 4, characterized in that: The high-pressure flushing system (6) includes a flushing water pump (61), a water outlet pipe (62) and a water suction pipe (63) are connected to the flushing water pump (61), the water outlet pipe (62) penetrates and extends into the drum filtration chamber (3), one end of the water outlet pipe (62) is connected with a spray head (64), and the spray head (64) faces the outer surface of the drum (32); on the outer side surface of the treatment tank (1) above the water outlet pipe (62), a water tank (65) is installed, a second water passing port (651) communicating with the drum filtration chamber (3) is opened on the side surface of the water tank (65), a first filter plate (652) is provided in the water tank (65) above the second water passing port (651), and the water suction pipe (63) is connected to the water tank (65) above the first filter plate (652).

6. The multi-stage sewage treatment equipment according to claim 5, characterized in that: An air pipe connected to an external aeration device is provided in the aeration and filtration chamber (4). A second filter plate (41) is provided in the aeration and filtration chamber (4) above the air pipe. A second partition plate (10) is provided between the aeration and filtration chamber (4) and the ultraviolet disinfection chamber (5). A third water passing port (101) is formed in the second partition plate (10) above the second filter plate (41), and the third water passing port (101) communicates with the ultraviolet disinfection chamber (5).

7. The multi-stage sewage treatment equipment according to claim 6, characterized in that: The ultraviolet lamp (51) is installed on the side surface of the second partition plate (10) close to the ultraviolet disinfection chamber (5). A light-transmitting and waterproof cover is arranged outside the ultraviolet lamp (51). The reflector (52) is installed on the inner side wall of the ultraviolet disinfection chamber (5).

8. The multi-stage sewage treatment equipment according to claim 7, characterized in that: The aperture of the filter basket (9) > the aperture of the first filter holes on the barrel body of the drum (32) > the aperture of the filter holes on the first filter plate.

9. The multi-stage sewage treatment equipment according to claim 8, characterized in that: A drain pipe (11) is installed on the treatment tank (1) on one side of the ultraviolet disinfection chamber (5).

10. A sewage treatment process, characterized in that: The sewage treatment process is applied to the multi-stage sewage treatment equipment as described in any one of claims 1-9. The sewage treatment process includes the following steps: S1: Stirring pretreatment: The stirring motor (21) drives the stirring rod (22) to rotate to stir and mix the sewage, and a flocculant agent is added to preliminarily aggregate the suspended substances in the sewage. S2: Multi-stage filtration: The stirred sewage flows into the drum filtration chamber (3) through the first water passing port (81) above the first partition plate (8). First, it is filtered by the filter basket (9) to intercept larger particle impurities. The filtered sewage enters the drum (32), and the motor (34) drives the drum to rotate through the transmission belt (36). The first filter holes on the barrel body of the drum further filter smaller suspended substances. S3: High-pressure flushing: The impurities attached to the surface of the drum are periodically flushed by the high-pressure flushing system (6). The flushing water pump (61) extracts the clear water filtered by the first filter plate (652) from the water tank (65) and impacts the surface of the drum with high-pressure water flow through the nozzle (64). The impurities fall to the bottom of the filter basket or the drum filtration chamber to realize self-cleaning of the drum. S4: Aeration biochemical treatment: The sewage filtered by the drum flows into the aeration and filtration chamber (4) from the end of the drum. The air pipe is connected to an external aeration device to introduce air into the sewage to promote aerobic microorganisms to decompose organic matter. The aerated sewage passes through the second filter plate (41) to intercept microbial flocs and fine impurities and further purify the water quality. S5: Ultraviolet disinfection: The sewage after aeration and filtration enters the ultraviolet disinfection chamber (5) through the third water passing port (101) on the second partition plate (10). The ultraviolet lamp (51) emits ultraviolet rays, and the reflector (52) reflects the light to enhance the disinfection effect and kill pathogenic microorganisms such as bacteria and viruses in the water. The qualified sewage after disinfection is discharged through the drain pipe (11).

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