Wastewater purification equipment based on biofilm combined process and purification method thereof

Abstract

The application discloses sewage purification equipment based on a biological membrane combined process and a purification method thereof, wherein the equipment comprises a main unit, a cleaning unit, a water isolation unit and a vibration unit; the main unit comprises a sewage purification tank, a biological membrane layer fixedly connected to the inside of the sewage purification tank, an activated carbon adsorption layer and a filter layer; the cleaning unit is located in the inside of the sewage purification tank and is used for cleaning the filter layer; the water isolation unit is arranged in the inside of the cleaning unit and is fixedly connected with the top wall in the sewage purification tank and is used for blocking sewage to avoid hindering the cleaning of the cleaning unit; and the vibration unit is connected with the cleaning unit and the water isolation unit. When the impurities are scraped off by the scraper, the sewage purification operation is not interrupted, and when the impurities are scraped off, the impurities are not easy to flow everywhere with the water flow, so that the impurity cleaning effect can be improved; in addition, when the impurities are scraped off to the impurity collecting box, it can be ensured that the impurities are not attached to the scraper, and the impurity cleaning effect is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage purification technical field, especially to a sewage purification device based on a biofilm combined process and a purification method thereof. BACKGROUND

[0002] In the field of sewage purification, the traditional sewage purification device generally uses filter screen, biofilm layer and activated carbon adsorption layer for step-by-step purification treatment. First, when the sewage passes through the filter screen, the filter screen can effectively filter out the large-particle impurities therein, providing a relatively clean water quality basis for the subsequent purification steps. However, since the large-particle impurities contained in the sewage are often large in size and numerous in quantity, the filter screen is prone to clogging during use, which not only reduces the purification efficiency, but also may cause damage to the equipment.

[0003] In order to solve the problem of filter screen clogging, the traditional method is to interrupt the operation several times during purification for manual or mechanical cleaning of the filter screen. Although this method can temporarily alleviate the problem of filter screen clogging, frequent interruption of operation will undoubtedly reduce the overall purification efficiency and increase the operating cost.

[0004] In recent years, some advanced sewage purification devices have begun to use scraper design, which concentrates and scrapes the impurities on the filter screen into the impurity collection box, thereby avoiding the problem of filter screen clogging and also eliminating the need to interrupt the purification operation. However, this design still has some problems in actual application. In particular, in the case of large water flow, impurities are easily floating in water and flowing everywhere with the water flow, which makes it difficult for the scraper to accurately scrape the impurities into the impurity collection box when scraping the impurities, resulting in poor impurity cleaning effect. SUMMARY

[0005] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] To solve the above technical problems, the present application provides the following technical solutions: a sewage purification device based on a biofilm combined process, mainly comprising:

[0007] A main unit, the main unit comprises a sewage purification tank, a biofilm layer fixedly connected inside the sewage purification tank, an activated carbon adsorption layer and a filter layer, the biofilm layer is located between the activated carbon adsorption layer and the filter layer;

[0008] A cleaning unit, the cleaning unit is located inside the sewage purification tank and fixedly connected with the sewage purification tank, and is used for cleaning the filter layer;

[0009] A water isolation unit is arranged inside the cleaning unit and fixedly connected with the inner top wall of the sewage purification tank, for blocking the sewage and avoiding hindering the cleaning of the cleaning unit.

[0010] A vibration unit is connected with the cleaning unit and the water isolation unit.

[0011] As a preferred scheme of the sewage purification equipment based on the combined process of biological membrane, the sewage purification tank is provided with a water inlet at the center of the top, a water outlet at the bottom of the front side, a through slot at the upper side of one side, and a cleaning port at the side.

[0012] As a preferred scheme of the sewage purification equipment based on the combined process of biological membrane, a transparent observation window is arranged on one side of the sewage purification tank.

[0013] As a preferred scheme of the sewage purification equipment based on the combined process of biological membrane, the filter layer comprises a conical filter screen arranged inside the sewage purification tank and an annular impurity receiving filter screen plate fixedly connected with the bottom of the conical filter screen, the annular impurity receiving filter screen plate is provided with an impurity discharge slot, the outer ring of the annular impurity receiving filter screen plate is fixedly connected with the sewage purification tank, and the annular impurity receiving filter screen plate corresponds to the transparent observation window.

[0014] As a preferred scheme of the sewage purification equipment based on the combined process of biological membrane, the cleaning unit comprises an outer gear ring movably arranged inside the sewage purification tank, a connecting pipe fixedly connected with the top of the outer gear ring, a cleaning assembly fixedly connected with the bottom of one side of the outer gear ring, a driving gear meshingly connected with one side of the outer gear ring, an extension plate fixedly connected with the top of the sewage purification tank, and a driving motor fixedly connected with the top of the extension plate.

[0015] The central axis of the outer gear ring and the connecting pipe corresponds to the central axis of the water inlet, the top end of the connecting pipe is rotatably connected with the inner top wall of the sewage purification tank through a bearing, the driving gear is movably arranged through the through slot, and the bottom output end of the driving motor is movably arranged through the extension plate and fixedly connected with the center of the driving gear.

[0016] As a preferred scheme of the sewage purification equipment based on the combined process of biological membrane, the cleaning assembly is arranged close to the impurity discharge slot, and the cleaning assembly comprises a vertical rod fixedly connected with the bottom of the outer gear ring, a scraper fixedly connected with the bottom end of the vertical rod, and an impurity receiving box fixedly connected with the inside of the impurity discharge slot.

[0017] The vertical rod bottom end is provided with a groove, the vertical rod side is provided with a moving groove communicated with the groove, the scraper is arranged close to the impurity discharge groove side edge, the scraper bottom is movably attached to the annular impurity receiving filter screen plate upper surface, the scraper side facing the impurity discharge groove is fixedly connected with a cover plate, and the cover plate is movably arranged on the impurity discharge groove top end.

[0018] The impurity receiving box one side is fixedly connected with the sewage purification tank inner wall, and the impurity receiving box side connected with the sewage purification tank is of an open structure, the opening is adapted to be inserted with a plugging piece, the plugging piece comprises a piston adapted to be inserted with the opening, the piston side away from the impurity receiving box is slidably arranged through the cleaning opening and is fixedly connected with a fixed plate, the fixed plate is detachably fixed between the sewage purification tank outer side wall, and the fixed plate side away from the piston is fixedly installed with a handle.

[0019] As a preferred scheme of the sewage purification equipment based on the biological membrane combined process, the waterproof unit comprises a fixed tube movably arranged at the center of the outer gear ring, the fixed tube bottom end is provided with an annular groove, the annular groove inner top wall is fixedly connected with a plurality of uniformly distributed first springs, the annular groove bottom end is adapted to be inserted with a sealing cover, the sealing cover top end is fixedly connected with the first spring bottom end, and the sealing cover bottom end is a slope surface parallel to the conical filter screen side surface.

[0020] The sealing cover outside is fixedly sleeved with a stress ring, the stress ring is provided with a notch at the vertical rod corresponding position, and the opposite two surfaces of the notch are both inclined slopes, and the two slopes are symmetrically arranged, the notch is movably arranged with a force applying rod, the force applying rod top end is fixedly connected with the outer gear ring bottom, the force applying rod bottom end is arranged as an arc structure, and the force applying rod bottom end arc is movably attached to the lower slope surface, and the force applying rod is spaced apart from the fixed tube.

[0021] As a preferred scheme of the sewage purification equipment based on the biological membrane combined process, the vibration unit comprises a vibration starting block fixedly connected with the fixed tube outer side surface and a vibration rod adapted to slide with the groove, the vibration starting block top is arranged as an inclined arc surface, and the side of the arc surface facing the force applying rod is the highest point, the vibration rod top end is fixedly connected with a second spring, the second spring is fixedly connected with the groove inner top wall, one side of the vibration rod is fixedly connected with a connecting column, the connecting column is slidably arranged through the moving groove, one end of the connecting column away from the vibration rod is fixedly connected with a lifting column, one end of the lifting column away from the connecting column is located between the vibration starting block and the force applying rod, and the vibration starting block corresponds to the cover plate.

[0022] As a preferred scheme of the sewage purification equipment based on the biological membrane combined process, the width of the vibration starting block is less than the gap between the fixed tube and the force applying rod.

[0023] The purification method using the sewage purification equipment based on the above-mentioned biofilm combined process comprises the following steps:

[0024] Step one: first, sewage is added into the sewage purification tank through the water inlet, and then the sewage falls on the conical filter screen through the fixed pipe, and the large-particle impurities in the sewage are filtered out by the conical filter screen, then the sewage flows through the biofilm layer, and the organic pollutants in the sewage are degraded by the microorganisms attached to the biofilm layer, finally, the sewage passes through the activated carbon adsorption layer, and the residual pollutants are further adsorbed and removed, and the purified clean water is discharged from the water outlet;

[0025] Step two: in the process of filtering out the large-particle impurities by the conical filter screen, the impurities are collected on the annular impurity receiving filter screen plate under the impact of the water flow, when the annular impurity receiving filter screen plate needs to be cleaned, the driving motor is started, the output end of the driving motor drives the outer gear ring to rotate clockwise through the driving gear, and then drives the force applying rod and the vertical rod to rotate synchronously; under the action of the rotating force, the force applying rod applies a downward pressing force to the stress ring by means of the cooperation between the arc structure at the bottom end and the inclined surface at the gap, so that the stress ring drives the sealing cover to closely adhere to the surface of the conical filter screen to block the water flow from entering the area of the annular impurity receiving filter screen plate; at the same time, the rotation of the vertical rod drives the scraper to rotate along the surface of the annular impurity receiving filter screen plate, and the impurities are scraped to the direction of the impurity discharge groove, so that the automatic cleaning is realized, and the sewage purification operation is not interrupted during the cleaning process;

[0026] Step three: the vertical rod also drives the connecting column, the vibration rod and the lifting column to rotate synchronously; when the scraper rotates to the edge of the impurity discharge groove, the lifting column is just rotated to the lowest point of the vibration starting block, and with the continuous rotation, the lifting column gradually rises from the lowest point to the highest point of the vibration starting block, in the process, the lifting column moves upward under the stress, and drives the connecting column and the vibration rod to move upward, and the second spring is compressed; when the lifting column rotates out of the highest point of the vibration starting block, the vibration rod suddenly drops under the rebound force of the second spring, and knocks the top end of the scraper, so as to ensure that the impurities are not attached to the scraper;

[0027] Step four: then, the scraper, the force applying rod and the lifting column are continuously driven to rotate, until the force applying rod is rotated to the gap, when the force applying rod is rotated to the gap, the sealing cover and the stress ring move upward and reset under the rebound force of the first spring; at the same time, the scraper drives the cover plate to reset and cover the top of the impurity discharge groove, so as to prevent a large amount of sewage from entering the impurity receiving box;

[0028] Step five: after the purification process is completed, the fixing plate is disassembled, the piston is pulled out from the cleaning port, and then the inside of the impurity receiving box is cleaned, and the whole purification process is completed.

[0029] The beneficial effects of the present application are as follows:

[0030] 1. In the present invention, when scraping and cleaning impurities on the annular impurity receiving filter plate, the drive motor is started. The output end of the drive motor drives the outer gear ring to rotate clockwise via the driving gear, thereby driving the force rod and the vertical rod to rotate synchronously. Under the action of the rotational force, the force rod uses the arc structure at its bottom end to cooperate with the inclined surface of the notch to apply downward pressure to the force ring, causing the force ring to drive the sealing cover downward and tightly fit the conical filter surface, thereby preventing water from continuing to enter the area of ​​the annular impurity receiving filter plate. The water volume on the annular impurity receiving filter plate can be observed through a transparent observation window. When the water volume is high, the drive motor can be turned off when the sealing cover fits the conical filter surface. When the water volume decreases, the drive motor is restarted. The scraper then scrapes the impurities into the impurity discharge trough and then drops them into the impurity collection box for centralized collection. The entire operation process does not interrupt the sewage purification operation and does not affect the sewage treatment efficiency. In addition, when the scraper is used to scrape impurities, it is difficult for impurities to flow with the water flow, ensuring that the impurities are smoothly scraped into the impurity collection box, thereby improving the impurity cleaning effect.

[0031] 2. In the present invention, when the scraper rotates to the edge of the other side of the impurity discharge groove, the lifting column just rotates to the lowest point of the vibration starting block. As it continues to rotate, the lifting column gradually rises from the lowest point of the vibration starting block to the highest point. During this process, the lifting column is forced to move upward, and at the same time drives the connecting column and the vibration rod to move upward, and the second spring is compressed; when the lifting column rotates out from the highest point of the vibration starting block, the vibration rod suddenly drops under the action of the rebound force of the second spring, knocking the top of the scraper, thereby ensuring that impurities will not adhere to the scraper, thereby further improving the impurity cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0033] Figure 1 It is a schematic diagram of the overall structure of the sewage purification equipment based on the biofilm combination process of the present invention.

[0034] Figure 2 This is a schematic structural diagram of a sewage purification tank of the sewage purification equipment based on the biofilm combination process of the present invention.

[0035] Figure 3 It is a schematic cross-sectional structural diagram of the sewage purification equipment based on the biofilm combination process of the present invention.

[0036] Figure 4Structure diagram of the filter layer of the sewage purification equipment based on the combined process of bio-membrane according to the present application.

[0037] Figure 5 Structure diagram of the cleaning unit of the sewage purification equipment based on the combined process of bio-membrane according to the present application.

[0038] Figure 6 Structure diagram of the water isolation unit of the sewage purification equipment based on the combined process of bio-membrane according to the present application.

[0039] Figure 7 Structure diagram of the water isolation unit of the sewage purification equipment based on the combined process of bio-membrane according to the present application.

[0040] Figure 8 Structure diagram of the connection between the vibration unit and the vertical rod of the sewage purification equipment based on the combined process of bio-membrane according to the present application.

[0041] Figure 9 Structure diagram of the vibration unit of the sewage purification equipment based on the combined process of bio-membrane according to the present application when purifying sewage.

[0042] Figure 10 Structure diagram of the sewage purification equipment based on the combined process of bio-membrane according to the present application when cleaning and when the lifting column rises to the highest point of the vibration starting block.

[0043] In the figure: 100, main unit; 101, sewage purification tank; 102, bio-membrane layer; 103, activated carbon adsorption layer; 104, filter layer; 104-1, conical filter screen; 104-2, annular impurity receiving filter screen plate; 104-3, impurity discharge groove; 105, water inlet; 106, water outlet; 107, transparent observation window; 108, through groove; 109, cleaning port; 200, cleaning unit; 201, external gear ring; 202, connecting pipe; 203, cleaning assembly; 203-1, vertical rod; 203-2, scraper; 203-3, impurity receiving box; 203-4, groove; 203-5, moving groove; 203-6, cover plate; 203-7, piston; 203-8, fixed plate; 204, driving gear; 205, extension plate; 206, driving motor; 300, water isolation unit; 301, fixed pipe; 302, annular groove; 303, first spring; 304, sealing cover; 305, force receiving ring; 306, force applying rod; 307, notch; 400, vibration unit; 401, vibration starting block; 402, vibration rod; 403, second spring; 404, connecting column; 405, lifting column. DETAILED DESCRIPTION

[0044] In order to make the above objectives, characteristics and advantages of the present application more obvious and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0045] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in a variety of ways other than those specifically described herein without departing from the scope of the present application, and it is understood that it covers all technical and structural equivalents of the elements described and practiced in the same manner for the same purpose. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0046] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or mutually exclusive of other embodiments.

[0047] Thirdly, the present application is described in detail in conjunction with the schematic diagram. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0048] Embodiment 1

[0049] Reference Figures 1-9 For the first embodiment of the present application, a sewage purification equipment based on a biofilm combined process is provided, mainly comprising:

[0050] The main unit 100, such as Figures 1-3 The main unit 100 includes a sewage purification tank 101, a biofilm layer 102 fixedly connected inside the sewage purification tank 101, an activated carbon adsorption layer 103 and a filter layer 104, the biofilm layer 102 is located between the activated carbon adsorption layer 103 and the filter layer 104, and the filter layer 104 is at the top, a water inlet 105 is arranged at the center of the top of the sewage purification tank 101 for introducing sewage into the sewage purification tank 101, a water outlet 106 is arranged at the bottom of the front side of the sewage purification tank 101 for discharging clean water from the sewage purification tank 101, a transparent observation window 107 is sealingly arranged on one side of the sewage purification tank 101, a through slot 108 is arranged on one side of the sewage purification tank 101, and a cleaning port 109 is arranged on the side of the sewage purification tank 101, which can clean the inside of the impurity receiving box 203-3 when the cleaning port 109 is opened.

[0051] As Figure 4The filter layer 104 includes a conical filter 104-1 located inside the sewage purification tank 101 and an annular impurity receiving filter plate 104-2 fixedly connected to the bottom of the circumference of the conical filter 104-1. An impurity discharge groove 104-3 is provided on the annular impurity receiving filter plate 104-2. The outer ring of the annular impurity receiving filter plate 104-2 is sealed and fixed to the sewage purification tank 101. The annular impurity receiving filter plate 104-2 corresponds to a transparent observation window 107, and the water amount on the annular impurity receiving filter plate 104-2 can be easily checked through the transparent observation window 107.

[0052] Cleaning unit 200, such as Figure 3 , the cleaning unit 200 is located inside the sewage purification tank 101 and is fixedly connected to the sewage purification tank 101, and is used to clean the filter layer 104;

[0053] Waterproof unit 300, such as Figure 3 The water-isolating unit 300 is disposed inside the cleaning unit 200 and is fixedly connected to the top wall of the sewage purification tank 101 to block the sewage and avoid hindering the cleaning of the cleaning unit 200;

[0054] Specifically, such as Figure 5 The cleaning unit 200 includes an outer gear ring 201 movably disposed inside the sewage purification tank 101, a connecting pipe 202 fixedly connected to the top of the outer gear ring 201, a cleaning assembly 203 fixedly connected to the bottom of one side of the outer gear ring 201, a driving gear 204 meshingly connected to one side of the outer gear ring 201, an extension plate 205 fixedly connected to the top of the sewage purification tank 101, and a driving motor 206 fixedly connected to the top of the extension plate 205;

[0055] The central axis of the outer gear ring 201 and the connecting pipe 202 corresponds to the central axis of the water inlet 105. The top end of the connecting pipe 202 is rotatably connected to the inner top wall of the sewage purification tank 101 via a bearing. The driving gear 204 is movable through the through slot 108. The bottom output end of the drive motor 206 is movable through the extension plate 205 and fixedly connected to the center of the driving gear 204. When it is necessary to clean the upper surface of the annular impurity receiving filter plate 104-2, the drive motor 206 is started. The drive motor 206 drives the outer gear ring 201 to rotate clockwise via the driving gear 204. The outer gear ring 201 drives the cleaning assembly 203 to rotate and clean. The cleaning assembly 203 scrapes impurities and sends them to the impurity discharge slot 104-3, completing the automatic cleaning process.

[0056] Furthermore, if Figure 5The cleaning assembly 203 is arranged close to the impurity discharge groove 104-3, and the cleaning assembly 203 comprises a vertical rod 203-1 fixedly connected to the bottom of the outer gear ring 201, a scraper 203-2 fixedly connected to the bottom end of the vertical rod 203-1, and an impurity receiving box 203-3 fixedly connected to the inside of the impurity discharge groove 104-3.

[0057] As Figure 8 , the bottom end of the vertical rod 203-1 is provided with a groove 203-4, and the side surface of the vertical rod 203-1 is provided with a moving groove 203-5 in communication with the groove 203-4, the scraper 203-2 is arranged close to the side edge of the impurity discharge groove 104-3, the bottom of the scraper 203-2 is movably attached to the upper surface of the annular impurity receiving filter screen plate 104-2, and the side of the scraper 203-2 facing the counterclockwise rotating direction is fixedly connected with a cover plate 203-6 (as Figure 9 ), which is tightly attached to the top end of the impurity discharge groove 104-3. The advantage of this arrangement is that during sewage filtration, the sewage is less likely to enter the impurity collection box 203-3, facilitating the cleaning of the inside of the impurity collection box 203-3 by workers later.

[0058] As Figure 5 , one side of the impurity receiving box 203-3 is fixedly connected to the inner wall of the sewage purification tank 101, and the side of the impurity receiving box 203-3 connected to the sewage purification tank 101 is of an open structure, the opening is sealingly and fixedly connected to the sewage purification tank 101, and the opening is adapted to be inserted with a plugging member, the plugging member comprises a piston 203-7 sealingly and adaptively inserted with the opening, the side of the piston 203-7 away from the impurity receiving box 203-3 slides out of the cleaning port 109 and is fixedly connected with a fixed plate 203-8, the fixed plate 203-8 is detachably fixed between the outer side wall of the sewage purification tank 101, and the side of the fixed plate 203-8 away from the piston 203-7 is fixedly installed with a handle. When the purification process is completed, the fixed plate 203-8 is disassembled, then the fixed plate 203-8 is pulled back by the handle, so that the piston 203-7 is pulled out of the impurity receiving box 203-3 and the cleaning port 109, and the inside of the impurity receiving box 203-3 can be cleaned.

[0059] Specifically, as Figure 7The water-proof unit 300 comprises a fixed tube 301 movably arranged at the center of the outer gear ring 201, and the fixed tube 301 is movably covered outside the conical filter screen 104-1. The bottom end of the fixed tube 301 is provided with an annular groove 302, and the inner top wall of the annular groove 302 is fixedly connected with a plurality of uniformly distributed first springs 303. The bottom end of the annular groove 302 is adaptively inserted with a sealing cover 304, the top end of the sealing cover 304 is fixedly connected with the bottom end of the first spring 303, and the bottom end of the sealing cover 304 is a slope parallel to the side surface of the conical filter screen 104-1. The purpose of such arrangement is that when the sealing cover 304 moves downward, it can be tightly attached to the side surface of the conical filter screen 104-1, thereby achieving the water blocking effect.

[0060] As Figure 6 The outer part of the sealing cover 304 is fixedly sleeved with a stress ring 305, the stress ring 305 is provided with a notch 307 at the corresponding position of the vertical rod 203-1, and the opposite two surfaces of the notch 307 are both arranged as downward inclined slopes, and the two slopes are symmetrically arranged. The notch 307 is movably arranged with a force applying rod 306, the top end of the force applying rod 306 is fixedly connected with the bottom part of the outer gear ring 201, the bottom end of the force applying rod 306 is arranged as an arc structure, and the arc structure of the bottom end of the force applying rod 306 is movably attached to the lower part of the slope. The purpose of such arrangement is that when the force applying rod 306 is subjected to the rotational force in the clockwise direction, the arc structure of the bottom end of the force applying rod 306 can be used to cooperate with the slope at the notch 307 to apply downward pressing force to the stress ring 305, so that the stress ring 305 drives the sealing cover 304 to be tightly attached to the surface of the conical filter screen 104-1, thereby blocking the water flow from continuously entering the area of the annular impurity receiving filter screen plate 104-2. The force applying rod 306 is arranged in a spaced manner with the fixed tube 301, so that when the force applying rod 306 rotates, no friction will be generated between the force applying rod 306 and the fixed tube 301.

[0061] In conclusion, in the present application, when the impurities on the annular impurity receiving filter screen plate 104-2 are scraped and cleaned, the driving motor 206 is started, the output end of the driving motor 206 drives the outer gear ring 201 to rotate clockwise through the driving gear 204, and in turn drives the force applying rod 306 and the vertical rod 203-1 to rotate synchronously; under the action of the rotating force, the force applying rod 306 applies a downward pressing force to the stress ring 305 by means of the cooperation between the arc-shaped structure at the bottom end thereof and the inclined surface at the gap 307, so that the stress ring 305 drives the sealing cover 304 to closely adhere to the surface of the conical filter screen 104-1, thereby being able to block the water flow from continuing to enter the area of the annular impurity receiving filter screen plate 104-2; the water amount on the annular impurity receiving filter screen plate 104-2 is observed through the transparent observation window 107, when the water amount is large, the driving motor 206 can be closed when the sealing cover 304 adheres to the surface of the conical filter screen 104-1, so that the sewage is filtered and falls through the annular impurity receiving filter screen plate 104-2, when the water amount is reduced, the driving motor 206 is started again, then the impurities are scraped into the impurity discharge groove 104-3 by the scraper 203-2, and then fall into the impurity receiving box 203-3 for centralized collection, the whole operation process does not interrupt the sewage purification operation and does not affect the sewage treatment efficiency, in addition, the impurities are not easy to flow everywhere with the water flow when scraped by the scraper 203-2, so that the impurities can be smoothly scraped into the impurity collecting box 203-3, and the impurity cleaning effect is improved.

[0062] Example 2

[0063] Reference Figures 8-10 For the second embodiment of the present application, the difference between this embodiment and the first embodiment is that the device further comprises a vibration unit 400, which is connected with the cleaning unit 200 and the water isolation unit 300.

[0064] Specifically, the vibration unit 400 comprises a vibration starting block 401 fixedly connected to the outer side of the fixed tube 301 and a vibration rod 402 slidably connected to the groove 203-4, the top of the vibration starting block 401 is provided with an inclined arc surface, the highest point of which is located on the side facing the force applying rod 306, the top end of the vibration rod 402 is fixedly connected with a second spring 403, the second spring 403 is fixedly connected with the inner top wall of the groove 203-4, one side of the vibration rod 402 is fixedly connected with a connecting column 404, the connecting column 404 is slidably arranged through the moving groove 203-5, the end of the connecting column 404 away from the vibration rod 402 is fixedly connected with a lifting column 405, the end of the lifting column 405 away from the connecting column 404 is located between the vibration starting block 401 and the force applying rod 306, and the vibration starting block 401 corresponds to the cover plate 203-6. The width of the vibration starting block 401 is smaller than the gap between the fixed tube 301 and the force applying rod 306, so that the vibration starting block 401 does not collide with the force applying rod 306 when the force applying rod 306 rotates, thereby preventing the rotation of the force applying rod 306 from being hindered by the vibration starting block 401.

[0065] The rest of the structure is the same as that of example 1.

[0066] In summary, when the scraper 203-2 rotates to the other side edge of the impurity discharging groove 104-3, the lifting column 405 is just rotated to the lowest point of the vibration starting block 401, and as the rotation continues, the lifting column 405 is gradually lifted from the lowest point to the highest point of the vibration starting block 401, in the process, the lifting column 405 is forced to move upward, and simultaneously drives the connecting column 404 and the vibration rod 402 to move upward, and the second spring 403 is compressed; when the lifting column 405 rotates out of the highest point of the vibration starting block 401, the vibration rod 402 suddenly drops under the rebounding force of the second spring 403, and knocks the top end of the scraper 203-2, thereby ensuring that the impurities do not adhere to the scraper 203-2, and further improving the cleaning effect of the impurities.

[0067] The purification method using the above-mentioned sewage purification equipment based on the combined process of the bio-membrane comprises the following steps:

[0068] Step one: first, sewage is added into the sewage purification tank 101 through the water inlet 105, and then the sewage falls onto the conical filter screen 104-1 through the fixed tube 301, and the large-particle impurities in the sewage are filtered out by the conical filter screen 104-1, then the sewage flows through the bio-membrane layer 102, and the organic pollutants in the sewage are degraded by the microorganisms attached to the bio-membrane layer 102, finally, the sewage passes through the activated carbon adsorption layer 103, and the residual pollutants are further adsorbed and removed, and the purified clean water is discharged from the water outlet 106;

[0069] Step two: in the process of filtering large-particle impurities by the conical filter screen 104-1, the impurities are collected on the annular impurity receiving filter screen plate 104-2 under the impact of the water flow. When the annular impurity receiving filter screen plate 104-2 needs to be cleaned, the driving motor 206 is started, and the output end of the driving motor 206 drives the outer gear ring 201 to rotate clockwise through the driving gear 204, thereby driving the force applying rod 306 and the vertical rod 203-1 to rotate synchronously; under the action of the rotating force, the force applying rod 306, by means of the arc-shaped structure at the bottom end thereof and the slope at the gap 307, applies a downward pressing force to the force receiving ring 305, so that the force receiving ring 305 drives the sealing cover 304 to closely adhere to the surface of the conical filter screen 104-1, so as to block the water flow from continuing to enter the area of the annular impurity receiving filter screen plate 104-2; at the same time, the rotation of the vertical rod 203-1 drives the scraper 203-2 to rotate along the surface of the annular impurity receiving filter screen plate 104-2, so as to scrape the impurities to the direction of the impurity discharge groove 104-3, thereby realizing automatic cleaning without interrupting the sewage purification operation during the cleaning process;

[0070] Step three: the vertical rod 203-1 also drives the connecting column 404, the vibrating rod 402 and the lifting column 405 to rotate synchronously; when the scraper 203-2 rotates to the edge of the impurity discharge groove 104-3, the lifting column 405 is just rotated to the lowest point of the vibration starting block 401, and as the rotation continues, the lifting column 405 is gradually lifted from the lowest point to the highest point of the vibration starting block 401; in this process, the lifting column 405 is forced to move upward, and the connecting column 404 and the vibrating rod 402 are also moved upward, and the second spring 403 is compressed; when the lifting column 405 rotates out of the highest point of the vibration starting block 401, the vibrating rod 402 suddenly drops under the rebounding force of the second spring 403, so as to knock the top end of the scraper 203-2, thereby ensuring that the impurities are not attached to the scraper 203-2;

[0071] Step four: then, the scraper 203-2, the force applying rod 306 and the lifting column 405 are continuously rotated until the force applying rod 306 is rotated back to the gap 307; when the force applying rod 306 is rotated back to the gap 307, the sealing cover 304 and the force receiving ring 305 are moved upward and reset under the rebounding force of the first spring 303; at the same time, the scraper 203-2 drives the cover plate 203-6 to reset and cover the top of the impurity discharge groove 104-3, so as to prevent a large amount of sewage from entering the impurity receiving box 203-3;

[0072] Step five: after the purification process is completed, the fixed plate 203-8 is disassembled, the piston 203-7 is pulled out from the cleaning port 109, and then the inside of the impurity receiving box 203-3 is cleaned, thereby completing the entire purification process.

[0073] It is worth noting that the whole device is controlled by the controller, and the controller is a common device and belongs to the existing mature technology, so its electrical connection relationship and specific circuit structure are not described here.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A sewage purification plant based on a combined process of biofilm, characterized in that, Include: The main unit (100) includes a sewage purification tank (101), a biological membrane layer (102) fixedly connected with the inside of the sewage purification tank (101), an activated carbon adsorption layer (103) and a filter layer (104), the biological membrane layer (102) is located between the activated carbon adsorption layer (103) and the filter layer (104); The cleaning unit (200) is located in the inside of the sewage purification tank (101), and is fixedly connected with the sewage purification tank (101), and is used for cleaning the filter layer (104); The water isolation unit (300) is arranged in the inside of the cleaning unit (200), and is fixedly connected with the inner top wall of the sewage purification tank (101), for blocking sewage and avoiding hindering the cleaning of the cleaning unit (200); The vibration unit (400) is connected with the cleaning unit (200) and the water isolation unit (300); The cleaning unit (200) includes an outer gear ring (201) movably arranged in the inside of the sewage purification tank (101), a connecting pipe (202) fixedly connected with the top of the outer gear ring (201), a cleaning assembly (203) fixedly connected with the bottom of one side of the outer gear ring (201), a driving gear (204) meshingly connected with one side of the outer gear ring (201), an extension plate (205) fixedly connected with the top of the sewage purification tank (101), and a driving motor (206) fixedly connected with the top of the extension plate (205); The central axis of the outer gear ring (201) and the connecting pipe (202) corresponds to the central axis of the water inlet (105), the top end of the connecting pipe (202) is rotatably connected with the inner top wall of the sewage purification tank (101) through a bearing, the driving gear (204) is movably arranged through the through slot (108), and the bottom output end of the driving motor (206) movably passes through the extension plate (205) and is fixedly connected with the center of the driving gear (204); The cleaning assembly (203) is arranged close to the impurity discharge groove (104-3), and the cleaning assembly (203) includes a vertical rod (203-1) fixedly connected with the bottom of the outer gear ring (201), a scraper (203-2) fixedly connected with the bottom end of the vertical rod (203-1), and an impurity receiving box (203-3) fixedly connected with the inside of the impurity discharge groove (104-3); The bottom end of the vertical rod (203-1) is provided with a groove (203-4), the side surface of the vertical rod (203-1) is provided with a moving groove (203-5) communicated with the groove (203-4), the scraper (203-2) is arranged close to the side edge of the impurity discharge groove (104-3), the bottom of the scraper (203-2) is movably attached to the upper surface of the annular impurity receiving filter screen plate (104-2), and the side of the scraper (203-2) facing the impurity discharge groove (104-3) is fixedly connected with a cover plate (203-6), and the cover plate (203-6) is movably arranged on the top end of the impurity discharge groove (104-3). The impurity receiving box (203-3) is fixedly connected with the inner wall of the sewage purification tank (101) on one side, and the side of the impurity receiving box (203-3) connected with the sewage purification tank (101) is of an open structure. The open structure is adaptively and telescopically connected with a blocking piece. The blocking piece comprises a piston (203-7) telescopically connected with the opening. The side of the piston (203-7) away from the impurity receiving box (203-3) slides out of the cleaning port (109) and is fixedly connected with a fixed plate (203-8). The fixed plate (203-8) is detachably fixed between the outer side wall of the sewage purification tank (101). The side of the fixed plate (203-8) away from the piston (203-7) is fixedly connected with a handle. The waterproof unit (300) comprises a fixed tube (301) movably arranged at the center of the outer gear ring (201). The bottom end of the fixed tube (301) is provided with an annular groove (302). The inner top wall of the annular groove (302) is fixedly connected with a plurality of uniformly distributed first springs (303). The bottom end of the annular groove (302) is telescopically connected with a sealing cover (304). The top end of the sealing cover (304) is fixedly connected with the bottom end of the first spring (303). The bottom end of the sealing cover (304) is a bevel surface parallel to the side surface of the conical filter screen (104-1). The outer part of the sealing cover (304) is fixedly sleeved with a stress ring (305). The stress ring (305) is provided with a notch (307) at the corresponding position of the vertical rod (203-1). The opposite two faces of the notch (307) are both inclined bevel surfaces, and the two bevel surfaces are symmetrically arranged. The notch (307) movably arranged with a force applying rod (306). The top end of the force applying rod (306) is fixedly connected with the bottom of the outer gear ring (201). The bottom end of the force applying rod (306) is provided with an arc structure, and the arc structure of the bottom end of the force applying rod (306) is movably matched with the bevel surface below. The force applying rod (306) is spaced apart from the fixed tube (301).

2. The biofilm-based combined process wastewater treatment plant according to claim 1, characterized in that: The top center of the sewage purification tank (101) is provided with a water inlet (105). The front bottom of the sewage purification tank (101) is provided with a water outlet (106). The sewage purification tank (101) is provided with a through groove (108) on one side and above. The sewage purification tank (101) is provided with a cleaning port (109) on the side.

3. The biofilm-based combined process wastewater treatment plant according to claim 2, characterized in that: The sewage purification tank (101) is provided with a transparent observation window (107) on one side.

4. The biofilm-based combined process wastewater treatment plant according to claim 1, wherein: The filter layer (104) comprises a conical filter screen (104-1) located inside the sewage purification tank (101) and an annular impurity receiving filter screen plate (104-2) fixedly connected with the bottom of the conical filter screen (104-1). The annular impurity receiving filter screen plate (104-2) is provided with an impurity discharge groove (104-3). The outer ring of the annular impurity receiving filter screen plate (104-2) is sealingly fixed with the sewage purification tank (101). The annular impurity receiving filter screen plate (104-2) corresponds to the transparent observation window (107).

5. The biofilm-based combined process wastewater treatment plant according to claim 1, wherein: The vibration unit (400) comprises a vibration starting block (401) fixedly connected with the outer side of the fixed pipe (301) and a vibration rod (402) slidably connected with the groove (203-4), the vibration starting block (401) is provided with an inclined arc surface at the top, the highest point of the arc surface is located at the side of the force applying rod (306), the vibration rod (402) is fixedly connected with a second spring (403) at the top end, the second spring (403) is fixedly connected with the inner top wall of the groove (203-4), the vibration rod (402) is fixedly connected with a connecting column (404) at one side, the connecting column (404) is slidably arranged through the moving groove (203-5), the connecting column (404) is fixedly connected with a lifting column (405) at the end away from the vibration rod (402), the end of the lifting column (405) away from the connecting column (404) is located between the vibration starting block (401) and the force applying rod (306), and the vibration starting block (401) corresponds to the cover plate (203-6).

6. The biofilm-based combined process wastewater treatment plant according to claim 5, characterized in that: The width of the vibration starting block (401) is smaller than the gap between the fixed pipe (301) and the force applying rod (306).

7. The purification method of sewage by a biofilm-based combined process apparatus according to any one of claims 1 to 6, characterized by, The method comprises the following steps: Step one: firstly, sewage is added into the sewage purification tank (101) through the water inlet (105), then the sewage falls on the conical filter screen (104-1) through the fixed pipe (301), the large particle impurities in the sewage are filtered out by the conical filter screen (104-1), then the sewage flows through the biofilm layer (102), the organic pollutants in the sewage are degraded by the microorganisms attached to the biofilm layer (102), finally, the sewage passes through the activated carbon adsorption layer (103), further adsorbs and removes the residual pollutants, and the purified water is discharged through the water outlet (106); Step two: in the process of filtering out the large particle impurities by the conical filter screen (104-1), the impurities are collected on the annular impurity receiving filter screen plate (104-2) under the impact of the water flow, when the annular impurity receiving filter screen plate (104-2) needs to be cleaned, the driving motor (206) is started, the output end of the driving motor (206) drives the outer gear ring (201) to rotate clockwise through the driving gear (204), and then drives the force applying rod (306) and the vertical rod (203-1) to rotate synchronously; under the action of the rotating force, the arc-shaped structure at the bottom end of the force applying rod (306) cooperates with the inclined surface at the notch (307) to apply a downward pressing force to the stress ring (305), so that the stress ring (305) drives the sealing cover (304) to closely adhere to the surface of the conical filter screen (104-1) to block the water flow from entering the area of the annular impurity receiving filter screen plate (104-2); at the same time, the rotation of the vertical rod (203-1) drives the scraper (203-2) to rotate along the surface of the annular impurity receiving filter screen plate (104-2), and the impurities are scraped to the direction of the impurity discharge groove (104-3), so that the automatic cleaning is realized, and the sewage purification operation is not interrupted during the cleaning process. Step three: the vertical rod (203-1) rotates at the same time, also with the connection column (404), the vibration rod (402) and the lifting column (405) synchronous rotation; when the scraper (203-2) rotates to the edge of the impurity discharge groove (104-3), the lifting column (405) rotates to the lowest point of the vibration starting block (401), with the continue to rotate, the lifting column (405) from the vibration starting block (401) gradually rises to the highest point, in the process, the lifting column (405) is forced to move up, at the same time, the connecting column (404) and the vibration rod (402) are moved up, the second spring (403) is compressed; when the lifting column (405) rotates out from the highest point of the vibration starting block (401), the vibration rod (402) suddenly drops under the rebound force of the second spring (403), and knocks the top end of the scraper (203-2), to ensure that the impurities will not be attached to the scraper (203-2); Step four: then, continue to drive the scraper (203-2), the force bar (306), the lifting column (405) to rotate, until the force bar (306) is rotated to the notch (307), when the force bar (306) is rotated to the notch (307), the sealing cover (304) and the stress ring (305) move upward and reset under the rebound force of the first spring (303); at the same time, the scraper (203-2) drives the cover plate (203-6) to reset and cover the top of the impurity discharge groove (104-3), to prevent a large amount of sewage from entering the impurity receiving box (203-3); Step five: after completing the purification process, disassemble the fixed plate (203-8), pull out the piston (203-7) from the cleaning port (109), then clean the inside of the impurity receiving box (203-3), and complete the whole purification process.

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