Sewage purification device based on biological membrane treatment

Abstract

The utility model discloses a sewage purification device based on biological membrane treatment, which comprises a filtering device and a purification device, the filtering device is used for filtering large impurities in sewage, the purification device comprises a water dispersing plate and a biological membrane reactor which are arranged in a purification barrel body, the water dispersing plate is a hollow cone, the sewage in the filtering device automatically flows into the purification device, and the biological membrane reactor is arranged in the purification barrel body. And the sewage is flushed down on the upper surface of the water dispersing plate, the water dispersing plate is pushed to rotate, the flow speed of the sewage is reduced, the purification device is oxygenated, electromechanical equipment does not need to be added, and extra energy is not consumed.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, more particularly to a sewage purification device based on biological membrane treatment. BACKGROUND

[0002] The biological membrane sewage purification device is a kind of equipment using biological membrane technology to treat sewage, and the biological membrane refers to the film formed by microorganism growth on solid surface, which can effectively remove organic matter, nitrogen, phosphorus and other pollutants in sewage, and its basic principle is to degrade pollutants in sewage into harmless substances by the metabolic action of microorganism in biological membrane.

[0003] At present, the sewage purification device based on biological membrane treatment in the prior art is directly discharged into the interior of the device for purification when using part of the existing equipment, but sewage often contains some large impurities that cannot be purified, and part of the existing equipment is not convenient for intercepting and filtering, which may affect the effect of sewage purification, and may block biological membrane.

[0004] There are microorganisms on the biological membrane, in order to make the growth and activity of microorganism, optimize the effect of biological membrane treatment of sewage, oxygen should be increased in sewage, the common oxygen increasing methods include air-blowing aeration, mechanical aeration and adding chemical oxygen increasing agent, air-blowing aeration and mechanical aeration need equipment cost and consume energy, and can increase the flow rate of sewage, and the large flow rate can wash off biological membrane and make microorganism loss. Therefore, a sewage purification device based on biological membrane treatment is needed to solve the above problems. SUMMARY

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a sewage purification device based on biological membrane treatment to solve the problems in the above background.

[0006] The utility model provides the following technical scheme: a sewage purification device based on biological membrane treatment, comprising: a filter device and a purification device, sewage flows through the filter device and the purification device in sequence and is discharged, and the filter device is used for filtering large impurities in sewage.

[0007] The purification device comprises a purification barrel, a splash plate and a biofilm reactor arranged in the purification barrel, a groove arranged at the central position of the inner bottom wall of the purification barrel, a second rotating shaft fixedly connected to the central position of the inner bottom wall of the purification barrel and located in the groove, a main body of the splash plate being a hollow conical body with a tapered top, a second shaft sleeve fixedly connected to the central position of the lower surface of the splash plate, the second shaft sleeve being sleeved on the upper end of the second rotating shaft and being rotatably connected to the second rotating shaft, and the biofilm reactor comprising a connecting frame, a biofilm being detachably fixedly connected to the connecting frame, a protrusion arranged at the central position of the outer bottom wall of the connecting frame, the protrusion being in position correspondence with the groove and being in shape adaptation, a through hole being formed at the central position of the protrusion, the second rotating shaft being inserted into the through hole, and the protrusion being inserted into the groove.

[0008] The water level in the filtering device is higher than that in the purification device, the sewage in the filtering device flows into the purification device by itself and falls on the upper surface of the splash plate to push the splash plate to rotate.

[0009] Further, the filtering device is placed on the top of the purification barrel, a first rotating shaft is fixedly connected to the lower edge of the outer side wall of the filtering device, a first shaft sleeve is fixedly connected to the upper edge of the outer side wall of the purification barrel, the first rotating shaft is inserted into the first shaft sleeve and is rotatably connected thereto, and when the sewage is purified, the filtering device is rotated to the coaxial position with the purification device.

[0010] Further, the filtering device further comprises a water inlet pipe, a filter screen and a first water outlet pipe, the water inlet pipe is arranged at the position close to the upper edge of the main body of the filtering device and is used to introduce external sewage, the filter screen is placed in the main body of the filtering device and is used to filter large impurities in the sewage.

[0011] At least one first water outlet pipe is circumferentially and uniformly arranged at the bottom of the filtering device, the first water outlet pipe has an inclination angle of 30º-60º between the axis thereof and the bottom surface of the filtering device, and the filtered sewage flows into the purification device through the first water outlet pipe.

[0012] The inclination design of the first water outlet pipe can enable the splash plate to obtain the best pushing force.

[0013] Further, a plurality of curved blades are fixedly connected to the upper surface of the splash plate in a circumferential and uniform manner, a marginal standing blade is fixedly connected to the upper surface of the splash plate close to the edge, a plurality of small holes for permeating the sewage are circumferentially and uniformly arranged on the marginal standing blade, a plurality of stirring rods are circumferentially and uniformly fixedly connected to the lower surface of the splash plate close to the edge, the lower end of the stirring rod extends into the sewage, and the stirring rods stir the sewage when the splash plate rotates.

[0014] The curved blades, the stirring rods, the marginal standing blade and the small holes for permeating the sewage can all increase the oxygen in the sewage.

[0015] Further, a plurality of water passing holes for enabling the sewage to flow in and out of the connecting frame are formed in the side wall of the connecting frame.

[0016] Further, the air exchange window is arranged on the upper edge of the purification barrel for the air exchange inside and outside the purification barrel; the second water outlet pipe is arranged on the outer wall of the purification barrel close to the lower edge, and the purified water is discharged through the second water outlet pipe.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The potential energy difference of the sewage drives the water distribution plate to rotate, without increasing mechanical and electrical equipment and consuming additional energy; 2. The simple structure of the water distribution plate can increase the oxygen opportunity of the sewage; 3. Before purifying the sewage, the large impurities in the sewage are removed, so that the effect of purifying the sewage is not affected by the large impurities. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a three-dimensional structure schematic view in the use state of the present application;

[0020] Figure 2 It is a three-dimensional structure schematic view in the maintenance state of the present application;

[0021] Figure 3 It is an explosion view of the purification device;

[0022] Figure 4 It is an axonometric view of the water distribution plate;

[0023] Figure 5 It is another angle axonometric view of the water distribution plate;

[0024] Figure 6 It is an axonometric view of the biofilm reactor;

[0025] Figure 7 It is another angle axonometric view of the biofilm reactor;

[0026] Figure 8 It is an axonometric view of the purification barrel;

[0027] Figure 9 It is an axonometric view of the filter device;

[0028] Figure 10 It is another angle axonometric view of the filter device.

[0029] The reference signs are: 100. filtering device; 101. water inlet pipe; 102. first rotating shaft; 103. filtering screen; 104. first water outlet pipe; 200. purifying device; 201. first shaft sleeve; 202. air permeable window; 203. groove; 204. second rotating shaft; 205. second water outlet pipe; 206. purifying barrel; 210. water dispersing plate; 211. blade; 212. second shaft sleeve; 213. stirring rod; 214. edge standing piece; 220. biofilm reactor; 221. biofilm; 222. connecting frame; 223. through hole; 224. protruding block; 225. water passing hole. DETAILED DESCRIPTION

[0030] The technical solutions in the utility model will be described clearly and completely below in combination with the drawings in the utility model, and additionally, the forms of the structures recorded in the following embodiments are only examples, and the sewage purifying device based on biofilm treatment involved in the utility model is not limited to the structures recorded in the following embodiments, and all other embodiments obtained by the ordinary skilled in the art without making creative efforts belong to the protection scope of the utility model. Embodiment 1

[0031] Please refer to Figure 1 and 2 The utility model provides a sewage purifying device based on biofilm treatment, it includes: filtering device 100 and purifying device 200, filtering device 100 is placed on purifying device 200, and the water level of filtering device 100 is higher than the water level of purifying device 200, sewage is filtered by filtering device 100, and the bulk impurities are removed, and the sewage is flowed from filtering device 100 to purifying device 200, and the lower edge of the outer side wall of filtering device 100 is fixedly connected with first rotating shaft 102, and the upper edge of the outer side wall of purifying barrel 206 of purifying device 200 is fixedly connected with first shaft sleeve 201, first rotating shaft 102 is inserted in first shaft sleeve 201 and is rotationally connected with first shaft sleeve 201, when purifying sewage, rotating filtering device 100 to the coaxial position with purifying device 200, when installing and maintaining the internal equipment of purifying device 200, under the condition that the sewage in filtering device 100 is emptied, rotating filtering device 100 to the position of exposing the internal equipment of purifying device 200.

[0032] Please refer to Figure 9 and 10The filtering device 100 further comprises an inlet pipe 101, a filtering screen 103 and a first outlet pipe 104. The inlet pipe 101 is arranged at the upper edge of the main body of the filtering device 100, and external sewage is introduced into the filtering device 100 through the inlet pipe 101. The filtering screen 103 is arranged in the main body of the filtering device 100, and the sewage falls into the filtering screen 103, so that large impurities in the sewage are filtered. The filtering screen 103 can be taken out of the filtering device 100 to clean the large impurities, or the filtering screen 103 can not be taken out of the filtering device 100, and the large impurities can be cleaned by a net.

[0033] At least one first outlet pipe 104 is arranged at the bottom of the filtering device 100. The axis of the first outlet pipe 104 is inclined to the bottom surface of the filtering device 100 by an angle of 30-60°. If there are multiple first outlet pipes 104, the multiple first outlet pipes 104 are inclined in the same direction. In the embodiment, there are three first outlet pipes 104, which are inclined counterclockwise by an angle of 45°. The filtered sewage flows into the purifying device 200 through the multiple first outlet pipes 104. Since the first outlet pipes 104 are arranged to be inclined to the bottom surface of the filtering device 100, the sewage can generate the best rotating thrust on the water distribution plate 210 below when flowing into the water distribution plate 210.

[0034] Please refer to Figure 8 The purifying device 200 comprises a purifying barrel 206, a water distribution plate 210 and a biofilm reactor 220 arranged in the purifying barrel 206.

[0035] In addition to the first shaft sleeve 201, the purifying barrel 206 further comprises an air permeable window 202, a groove 203, a second rotating shaft 204 and a second outlet pipe 205. The air permeable window 202 is arranged at the upper edge of the purifying barrel 206 and above the water level in the purifying barrel 206, so that air in and out of the purifying barrel 206 can be exchanged. The groove 203 is fixedly arranged at the central position of the inner bottom wall of the purifying barrel 206, and is used for inserting the protrusion 224 of the biofilm reactor 220. The cross-sectional shape of the groove 203 can be other shapes except for a circular shape, such as a rectangular shape, a square shape, a triangular shape, other polygonal shapes, an oval shape and a cross shape, which aims to prevent the biofilm reactor 220 from rotating. In the embodiment, a regular hexagonal shape is adopted. One end of the second rotating shaft 204 is fixedly connected to the central position of the inner bottom wall of the purifying barrel 206 and located in the groove 203. The second outlet pipe 205 is fixedly connected to the outer lateral wall of the purifying barrel 206 near the lower edge and penetrates through the lateral wall of the purifying barrel 206. The purified water is discharged through the second outlet pipe 205.

[0036] Please refer to Figures 3-5The main body of the water dispersing plate 210 is a hollow conical body with a pointed top, which is arranged in the purification barrel 206, and the maximum diameter of the water dispersing plate 210 is smaller than the inner diameter of the purification barrel 206. The edge of the water dispersing plate 210 is spaced apart from the inner wall of the purification barrel 206, and the water level in the purification barrel 206 is below the conical plate of the water dispersing plate 210. The upper surface of the water dispersing plate 210 is fixedly provided with a plurality of curved blades 211 uniformly distributed in the circumferential direction. The curved blades 211 cooperate with the first water outlet pipe 104. When the plurality of curved blades 211 are impacted by the water flowing out of the plurality of first water outlet pipes 104, a rotating thrust of the water dispersing plate 210 is generated. The upper surface of the water dispersing plate 210 is fixedly connected with a marginal upright plate 214 near the edge. The marginal upright plate 214 is provided with a plurality of small holes for allowing the sewage to pass through and uniformly distributed in the circumferential direction. The lower surface of the water dispersing plate 210 is fixedly connected with a second shaft sleeve 212 at the central position. The second shaft sleeve 212 is sleeved on the other end of the second rotating shaft 204 and is rotatably connected with the second rotating shaft 204. The lower surface of the water dispersing plate 210 is fixedly connected with a plurality of stirring rods 213 uniformly distributed in the circumferential direction near the edge. The lower end of the stirring rod 213 extends into the sewage. When the water dispersing plate 210 rotates, the stirring rod 213 stirs the sewage. In this embodiment, the curved blades 211 are six, and the stirring rods 213 are six.

[0037] The water dispersing plate 210 is arranged to achieve the following effects. 1. The height of the filter device is different from that of the purification device. The potential energy of the sewage in the filter device is greater than that of the sewage in the purification device. The sewage flowing out of the filter device drives the water dispersing plate 210 to rotate, without the need to increase the electromechanical equipment and consume additional energy. 2. Multiple measures are taken to make the sewage fully contact with the air, so that more oxygen in the air is dissolved into the sewage. 1. The main body of the water dispersing plate 210 is designed as a conical plate, which reduces the falling speed of the sewage, disperses and flattens the sewage with large volume, and increases the contact area and contact time of the sewage with the air. 2. The curved blades 211 are impacted by the sewage, which generates a rotating thrust of the water dispersing plate 210 and also makes the sewage flow on the upper surface of the conical plate of the water dispersing plate 210 in a curved broken line, thereby increasing the contact time of the sewage with the air. 3. The water dispersing plate 210 is provided with the marginal upright plate 214, and the marginal upright plate 214 is provided with small holes for allowing the sewage to pass through, which further reduces the falling speed of the sewage and increases the contact time of the sewage with the air. 4. The stirring rods 213 are arranged. When the water dispersing plate 210 rotates, the stirring rods 213 stir the sewage. The stirring action promotes the mixing of the air in the sewage, so that the oxygen can better diffuse in the sewage.

[0038] Please refer to Figure 3 and Figures 6-7 The biofilm reactor 220 includes a biofilm 221, a connecting frame 222, a through hole 223, a protrusion 224, and a water passing hole 225.

[0039] The biofilm 221 is detachably fixed to the connecting frame 222, and the detachable fixing method can be various, such as screwing with a pressing strip, pressing slot cooperation, clamping or buckle structure connection, in the embodiment, the detachable fixing method of screwing with a pressing strip (not shown in the figure) is adopted, and the detachable fixing method is convenient for maintenance and replacement.

[0040] The connecting frame 222 is fixedly connected with a protrusion 224 at the lower bottom surface, the protrusion 224 is in position correspondence with the recess 203 and is in shape adaptation, the protrusion 224 is inserted into the recess 203 to prevent the biofilm reactor 220 from rotating.

[0041] The protrusion 224 is provided with a through hole 223 at the central position, and the through hole 223 is used for penetrating the second rotating shaft 204.

[0042] A plurality of water passing holes 225 are formed in the side wall of the connecting frame 222, and the water passing holes 225 are used for allowing sewage to flow in and out of the connecting frame 222.

[0043] In the embodiment, the biofilm 221 adopts the biofilm of the brand of Kesheng Environmental Protection, and the product pays attention to the adhesion performance and activity of microorganisms in the research and development process, can provide a good growth environment for microorganisms, and effectively decomposes organic matter in sewage.

[0044] The assembly steps of the utility model are as follows:

[0045] S1: Assembling the purification device

[0046] S1-1: Installing the biofilm reactor 220

[0047] Insert the second rotating shaft 204 on the purification barrel 206 into the through hole 223 of the biofilm reactor 220, and slide along the second rotating shaft 204, and insert the protrusion 224 into the recess 203;

[0048] S1-2: Installing the water distribution plate 210

[0049] The second shaft sleeve 212 of the water distribution plate is sleeved on the upper end of the second rotating shaft 204;

[0050] S2: Assembling the filter device

[0051] The filter screen 103 is assembled into the main body of the filter device 100;

[0052] S3: Combining the filter device and the purification device

[0053] The filter device 100 is lifted to the purification device 200, the first rotating shaft 102 is inserted into the first shaft sleeve 201, the filter device 100 is rotated to the coaxial position of the purification device 200, and is ready for use.

[0054] In use, sewage is injected into the filtering device 100 through the inlet pipe 101, filtered through the filter screen 103, and then flows into the purifying device 200 through the first outlet pipe 104, slowed down and oxygenated through the diffuser plate 210, and then purified through the biofilm reactor 200, and the purified water is discharged through the second outlet pipe 205; in maintenance, the filtering device 100 is rotated to expose the internal equipment of the purifying device 200.

[0055] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0056] Secondly: the utility model discloses the embodiment of the drawings, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design.

[0057] Finally: the above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A wastewater purification device based on biofilm treatment, comprising: The system comprises a filtration device (100) and a purification device (200), through which wastewater flows sequentially before being discharged. The purification device (200) includes a purification tank (206), a water distribution plate (210) and a biofilm reactor (220) disposed within the purification tank (206). A groove (203) is provided at the center of the inner bottom wall of the purification tank (206), and a second rotating shaft (204) is fixedly connected at the center of the inner bottom wall of the purification tank (206), with the second rotating shaft (204) located within the groove (203). The main body of the water distribution plate (210) is a hollow cone with its tip pointing upwards, and its lower surface... A second bushing (212) is fixedly connected at the center position. The second bushing (212) is sleeved on the upper end of the second rotating shaft (204) and is rotatably connected to the second rotating shaft (204). The biofilm reactor (220) includes a connecting frame (222). A biofilm (221) is detachably fixedly connected to the connecting frame (222). A protrusion (224) is provided at the center position on the outer bottom wall of the connecting frame (222). The protrusion (224) corresponds to the groove (203) in position and is adapted in shape. A through hole (223) is opened at the center position of the protrusion (224). The second rotating shaft (204) is inserted into the through hole (223), and the protrusion (224) is inserted into the groove (203). The water level in the filter device (100) is higher than the water level in the purification device (200). The sewage in the filter device (100) flows by gravity into the purification device (200) and splashes onto the upper surface of the water distribution plate (210), causing the water distribution plate (210) to rotate.

2. The wastewater purification device based on biofilm treatment according to claim 1, characterized in that: The filter device (100) is placed on top of the purification tank (206). The lower edge of the outer wall of the filter device (100) is fixedly connected to the first rotating shaft (102). The upper edge of the outer wall of the purification tank (206) is fixedly connected to the first bushing (201). The first rotating shaft (102) is inserted into the first bushing (201) and rotatedly connected to it. When purifying sewage, the filter device (100) is rotated to a position coaxial with the purification device (200).

3. The wastewater purification device based on biofilm treatment according to claim 2, characterized in that: The filter device (100) also includes an inlet pipe (101), a filter screen (103) and a first outlet pipe (104). The inlet pipe (101) is located near the upper edge of the main body of the filter device (100) and is used to introduce external sewage. The filter screen (103) is placed inside the main body of the filter device (100) and is used to filter large impurities in the sewage. At least one first water outlet pipe (104) is evenly distributed around the bottom of the filter device (100). The axis of the first water outlet pipe (104) is inclined at an angle of 30º-60º to the bottom surface of the filter device (100). After filtration, the sewage flows into the purification device (200) through the first water outlet pipe (104).

4. The wastewater purification device based on biofilm treatment according to claim 3, characterized in that: The upper surface of the water distribution plate (210) is uniformly connected with multiple curved blades (211) in a circumferential manner. The upper surface of the water distribution plate (210) is fixedly connected with a side support plate (214) near the edge. The side support plate (214) is uniformly provided with multiple small holes for sewage to pass through in a circumferential manner. The lower surface of the water distribution plate (210) is uniformly connected with multiple stirring rods (213) in a circumferential manner near the edge. The lower end of the stirring rod (213) extends into the sewage. When the water distribution plate (210) rotates, the stirring rod (213) stirs the sewage.

5. A wastewater purification device based on biofilm treatment according to claim 3, characterized in that: Multiple water passage holes (225) are provided on the side wall of the connecting frame (222) to allow sewage to flow inside and outside the connecting frame (222).

6. A wastewater purification device based on biofilm treatment according to any one of claims 1-5, characterized in that: A ventilation window (202) for air exchange between the inside and outside of the purification tank (206) is provided on the upper edge of the purification tank (206); a second water outlet pipe (205) is provided on the outer side wall of the purification tank (206) near the lower edge, and the purified water is discharged through the second water outlet pipe (205).

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