Sewage treatment device

Abstract

The utility model discloses a sewage treatment device, which is characterized in that a plurality of movable filter screen plates are arranged on a ditch at intervals along the length direction of the ditch, and the filter screen plates can change the water passing section in the ditch along with the change of sewage quantity in the ditch, so that the sewage is prevented from overflowing from the changed ditch and polluting the surrounding environment. A plant straw filler composite plate is arranged in the filter screen plate, the plant straw filler composite plate is prepared by laminating a plurality of rice straw pressing sheets and a plurality of reed straw pressing sheets at intervals, and aeration nozzles are arranged on the bottom surface of the ditch, so that the decontamination and purification effects are further improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and specifically to a wastewater treatment device. Background Technology

[0002] In the process of aquaculture, if the wastewater is not fully treated, it may contain excessively high levels of organic pollutants. These organic pollutants can enter the surrounding aquatic environment along with the wastewater, posing a potential threat to the ecosystem. They may affect the normal growth and reproduction of aquatic organisms, disrupt the aquatic ecological balance, and may even have adverse effects on human health through the food chain.

[0003] Most existing wastewater treatment devices utilize existing ditches and install filter screens within them. This only removes large particles of impurities from the wastewater. A more advanced method is to replace the filter screens with activated carbon packing walls. These walls are spaced apart within the ditch, forming multiple permeation filtration tanks. The activated carbon packing walls adsorb organic pollutants from the aquaculture wastewater. However, the activated carbon packing walls have tiny pores; if they are not replaced for a long time, these pores will become clogged with organic pollutants. Please refer to [link / reference needed]. Figure 1 , Figure 1 This is a schematic diagram of a commonly used aquaculture wastewater treatment device. The activated carbon packing wall 001 is fixedly connected and installed in the ditch 100. The height of each activated carbon packing wall 001 is different, and they are arranged in sequence from low to high in the direction of water inflow. However, the discharge of aquaculture wastewater is not timed or has a fixed flow rate. The wastewater that is suddenly discharged often overflows from the activated carbon packing wall 001 into the ditch 100, causing pollution to the surrounding environment.

[0004] To overcome the problem of sewage overflowing into ditches and causing environmental pollution, a new type of sewage treatment device needs to be designed. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a sewage treatment device in response to the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sewage treatment device, including a ditch, with multiple movable filter screens arranged at intervals along the length of the ditch, the filter screens changing the water flow cross section in the ditch according to the amount of sewage in the ditch.

[0007] The filter screen is equipped with a composite plate of plant straw filler, and aeration nozzles are installed on the bottom surface of the ditch.

[0008] Preferably, the filter screen plate comprises a screen plate body, both sides of the screen plate body are clamping plates with meshes, and a plant straw filler composite board is arranged between the two clamping plates.

[0009] The plant straw filler composite board is detachably connected with the clamping plates, so that the plant straw filler composite board can be conveniently replaced.

[0010] Preferably, the filter screen plate further comprises a stand column, a circular ring is fixedly arranged at each of upper and lower ends of the stand column, a rotating shaft is fixedly arranged at each of upper and lower ends of one side of the screen plate body, the circular ring is matched with the rotating shaft, the rotating shaft is movably sleeved in the circular ring and is rotationally connected, a straight spring is arranged between the two rotating shafts, one side of the straight spring is fixedly connected with the stand column, and the other side of the straight spring is fixedly connected with the screen plate body.

[0011] Preferably, the filter screen plate further comprises a hanging ring fixedly arranged on the top surface of the screen plate body, a plurality of pairs of horizontal rod seats are fixedly arranged on the top surfaces of the two side walls of the ditch in correspondence with intervals, one horizontal rod is arranged in each pair of horizontal rod seats, and the hanging ring is movably sleeved on the horizontal rod.

[0012] Preferably, the aeration nozzle is connected with the aeration device through a pipeline and sprays air or air containing ozone into the sewage in the ditch.

[0013] The above technical solution can bring the following beneficial effects:

[0014] 1. A plurality of movable filter screen plates are arranged on the ditch at intervals, the filter screen plates can change the water passing section in the ditch along with the change of the sewage volume in the ditch, so that the sewage is prevented from overflowing from the ditch and polluting the surrounding environment.

[0015] 2. The plant straw filler composite board is detachably connected with the clamping plates, so that the plant straw filler composite board can be conveniently replaced.

[0016] 3. The rice straw and the reed straw are used to purify the sewage, and the agricultural wastes are utilized, which is beneficial to environmental protection. DRAWINGS

[0017] Figure 1 is a schematic view of a commonly used breeding sewage treatment device;

[0018] Figure 2 is a top view of a sewage treatment device in a small sewage volume state of Example 1;

[0019] Figure 3 is an axonometric view of a sewage treatment device in a small sewage volume state of Example 1;

[0020] Figure 4 This is a top view of the wastewater treatment device under large wastewater volume conditions in Example 1;

[0021] Figure 5 This is an isometric view of the wastewater treatment device under large wastewater volume conditions in Example 1;

[0022] Figure 6 This is a schematic diagram of the filter screen structure;

[0023] Figure 7 This is an isometric view of the wastewater treatment device under low-volume wastewater conditions in Example 2;

[0024] Figure 8 This is an isometric view of the wastewater treatment device under the condition of large wastewater volume in Example 2.

[0025] In the diagram: 001. Activated carbon packing wall, 100. Ditch, 101. Aeration nozzle, 102. Crossbar seat, 103. Crossbar, 200. Filter screen, 201. Column, 202. Screen body, 203. Ring, 204. Rotating shaft, 205. Straight spring, 206. Plant straw packing composite board, 207. Clamping plate, 208. Hanging ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features.

[0030] Referring to Figure 1 , Figure 1 A schematic diagram of a commonly used aquaculture wastewater treatment device is shown. The wastewater treatment device uses an existing ditch, and active carbon filler walls are arranged in the ditch at intervals to form multiple infiltration filter pools. The active carbon filler walls 001 are fixedly connected and arranged in the ditch 100. The heights of the active carbon filler walls 001 are different, and the active carbon filler walls 001 are arranged in the ditch 100 at intervals from low to high in the direction of incoming water. The discharge of aquaculture wastewater is not timed and fixed in flow rate. Sudden discharge of wastewater often overflows outside the ditch 100 at the active carbon filler walls 001, causing pollution of the surrounding environment.

[0031] The general idea of the utility model is to arrange filter screen plates in the existing ditch at intervals. The filter screen plates are movably connected in the ditch. The movably connected filter screen plates can adapt to changes in the flow rate of wastewater and prevent wastewater from overflowing outside the ditch, causing pollution of the surrounding environment. In order to improve the decontamination and purification effect, plant straw filler composite boards are arranged in the filter screen plates. An aeration nozzle is arranged at the bottom of the ditch. Embodiment one

[0032] Referring to Figures 2-6 , Figures 2-5 is a schematic diagram of a section of the ditch provided with a filter screen plate, Figure 6 is a schematic diagram of a filter screen plate. In this embodiment, a plurality of filter screen plates 200 are arranged in the ditch 100 at intervals between the left and right side walls of the ditch 100 in the length direction of the ditch 100. The filter screen plates 200 on the left and right side walls are arranged in correspondence with each other.

[0033] Referring to Figure 6 , the filter screen plate 200 includes a stand column 201 and a screen plate body 202. A circular ring 203 is fixedly arranged at each of the upper and lower ends of the stand column 201. A rotating shaft 204 is fixedly arranged at each of the upper and lower ends of a side edge of the screen plate body 202. The circular ring 203 is matched with the rotating shaft 204. The rotating shaft 204 is movably sleeved in the circular ring 203 and is rotationally connected. A straight piece spring 205 is arranged between the two rotating shafts 204 of the side edge of the screen plate body 202. The straight piece spring 205 is an elastic steel sheet. The initial shape of the main body of the straight piece spring 205 is flat. The elastic steel sheet is deformed and bent under the action of external force. The elastic steel sheet can completely restore its initial flat shape after the external force is removed. One side edge of the straight piece spring 205 is fixedly connected with the stand column 201, and the other side edge is fixedly connected with the screen plate body 202. The stand column 201 is fixedly connected with the inner side wall of the ditch 100.

[0034] The two sides of the net plate body 202 are clamping plates 207 with mesh, and the plant straw filler composite board 206 is arranged between the two clamping plates 207. The plant straw filler composite board 206 is made of MBBR fillers after processing rice straw tablets and reed straw tablets. The rice straw tablets and the reed straw tablets have microorganisms for purifying sewage. The plant straw filler composite board 206 is prepared by stacking the rice straw tablets and the reed straw tablets in turn. The plant straw filler composite board 206 has strong adsorption, purification and degradation effects on organic pollutants and heavy metal pollutants in sewage. The plant straw filler composite board 206 that is replaced regularly can be used as a plant growth fertilizer after fermentation. The agricultural waste is beneficial to environmental protection.

[0035] The plant straw filler composite board 206 and the clamping plate 207 are detachably connected through a gasket, a threaded rod and a nut. A torsion spring and a lock catch can also be arranged between the two clamping plates 207. The two clamping plates 207 are pulled apart by force, and the plant straw filler composite board 206 is clamped therebetween. Then, the lock catch is buckled, and the plant straw filler composite board 206 is replaced regularly. The clamping plate 207 is a steel strip frame, a stainless steel mesh is arranged on the frame, first holes are drilled in the stainless steel mesh, and second holes are drilled in the plant straw filler composite board 206. When assembled, the first holes in the clamping plate 207 and the second holes in the plant straw filler composite board 206 are penetrated.

[0036] A plurality of aeration nozzles 101 are arranged on the bottom surface of the ditch 100 at intervals. The aeration nozzles 101 spray air or air containing ozone into the sewage in the ditch 100, further helping the plant straw filler composite board 206 to purify the sewage. The aeration nozzles 101 are connected to an aerator through a pipeline.

[0037] Please refer to Figure 4 and 5When in use, sewage flows from one end of the ditch 100 to the other end (the direction of water flow is indicated by the arrow in the figure), if the sewage flow rate is low, the water volume is small, and the pressure difference of the sewage on the front and back sides of the filter screen plate 200 is not enough to overcome the initial tension of the straight piece spring 205, the filter screen plate 200 is perpendicular to the side wall of the ditch 100, the sewage passes between the multiple filter screen plates 200 on the left and right sides, and the sewage is filtered, adsorbed, and permeated by the multiple filter screen plates 200, and is discharged after being purified, and the main flow direction is a large S shape; if the sewage is suddenly discharged, the water volume is large, the flow rate is high, and the pressure difference of the sewage on the front and back sides of the filter screen plate 200 is enough to overcome the initial tension of the straight piece spring 205, the filter screen plate 200 rotates around the shaft, and the rotating direction is changed from the water inlet direction to the water outlet direction, in this process, firstly, the flow rate of the sewage is inhibited due to the elastic force of the straight piece spring 205; secondly, the filter screen plate 200 rotates, so that the water passing section of the ditch 100 changes from small to large, the sewage is filtered, adsorbed, and permeated by the multiple filter screen plates 200, and is discharged after being purified, and the main flow direction is a small S shape, the water passing section is large, and the flow rate is inhibited again, so that the sewage is prevented from overflowing out of the ditch.

[0038] By using the technical scheme provided in the embodiment, the utility model is comprehensively designed by the maximum flow rate of sewage, the maximum flow rate, the maximum water passing section area of the ditch 100, the interval distance between the filter screen plates 200, and the initial tension of the straight piece spring 205, so that the sewage can be completely prevented from overflowing out of the ditch. Embodiment Two

[0039] Please refer to Figure 7 and 8 The difference from the embodiment 1 is that the hanging ring 208 is fixed on the top surface of the main body 202 of the filter screen plate 200, a plurality of pairs of horizontal rod seats 102 are fixed on the top surfaces of the side walls of the ditch 100 at intervals, one horizontal rod 103 is arranged in each pair of horizontal rod seats 102, and the hanging ring 208 is movably sleeved on the horizontal rod 103, and in the embodiment, the hanging ring 208 is two.

[0040] In use, sewage flows from one end of the ditch 100 to the other end (the direction of the arrows in the figure), if the sewage flow rate is low, the water volume is small, and the pressure difference of the sewage on the front and back sides of the filter screen plate 200 is not enough to overcome the static friction force of the hanging ring 208 on the filter screen plate 200 and the horizontal rod 103, the filter screen plate 200 is perpendicular to the bottom surface of the ditch 100, and the sewage is filtered, adsorbed, and permeated by multiple filter screen plates 200, and is discharged after being purified; if the sewage is suddenly discharged, the water volume increases, the flow rate becomes high, and the pressure difference of the sewage on the front and back sides of the filter screen plate 200 is enough to overcome the static friction force of the hanging ring 208 and the horizontal rod 103, the filter screen plate 200 suspended on the horizontal rod 103 rotates around the rod, and the rotating direction is changed from the water inlet direction to the water outlet direction, in this process, firstly, the flow rate of the sewage is inhibited due to the gravity of the filter screen plate 200; secondly, the filter screen plate 200 rotates around the rod, so that the water passing section of the ditch 100 changes from small to large, and the water passing section is large, so that the flow rate is inhibited, and sewage overflow is avoided.

[0041] By using the technical scheme provided in the embodiment, the utility model is comprehensively designed by parameters such as the maximum flow rate of sewage, the maximum flow speed, the maximum water passing section area of the ditch 100, the interval distance of the filter screen plates 200, the static friction force of the hanging ring 208 and the horizontal rod 103, and the like, so that sewage overflow outside the ditch can be completely avoided.

[0042] Compared with the embodiment 1, the embodiment has fewer components, low implementation cost, and is convenient and easy to install.

[0043] The utility model provides a sewage treatment device, the method and the way of specifically realizing this technical scheme are many, the above-mentioned are only preferred implementation modes of the utility model, it should be pointed out that, for ordinary skilled person in the prior art, on the premise of not departing from the principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The components not explicitly in the embodiment can be realized by the prior art.

Claims

1. A sewage treatment plant comprising a trench (100), characterised in that: A plurality of movable filter screen plates (200) are arranged along the length direction of the ditch (100), and the filter screen plates (200) change the water passing section of the ditch (100) with the change of the sewage amount in the ditch (100); The filter screen plate (200) is provided with a plant straw filler composite plate (206), and the bottom surface of the ditch (100) is provided with an aeration nozzle (101).

2. The sewage treatment device of claim 1, wherein: The filter screen plate (200) comprises a screen plate body (202), and the two sides of the screen plate body (202) are clamping plates (207) with meshes; the plant straw filler composite plate (206) is arranged between the two clamping plates (207), and the plant straw filler composite plate (206) is detachably connected with the clamping plates (207); the plant straw filler composite plate (206) is prepared by stacking a plurality of rice straw tablets and a plurality of reed straw tablets.

3. The sewage treatment device of claim 2, wherein: The filter screen plate (200) further comprises a stand column (201), and a circular ring (203) is fixedly arranged at each of the upper and lower ends of the stand column (201); a rotating shaft (204) is fixedly arranged at each of the upper and lower ends of one side of the screen plate body (202); the circular ring (203) is matched with the rotating shaft (204), the rotating shaft (204) is movably sleeved in the circular ring (203) and is rotationally connected; a straight piece spring (205) is arranged between the two rotating shafts (204), one side of the straight piece spring (205) is fixedly connected with the stand column (201), and the other side of the straight piece spring (205) is fixedly connected with the screen plate body (202); and the stand column (201) is fixedly connected with the inner side wall of the ditch (100).

4. The sewage treatment device of claim 2, wherein: The filter screen plate (200) further comprises a hanging ring (208) fixedly arranged on the top surface of the screen plate body (202). A plurality of pairs of horizontal rod seats (102) are fixedly arranged on the top surfaces of the two side walls of the ditch (100) in a corresponding and spaced manner, one horizontal rod (103) is arranged in each pair of horizontal rod seats (102), and the hanging ring (208) is movably sleeved on the horizontal rod (103).

5. The sewage treatment device according to any one of claims 1-4, characterized in that: The aeration nozzle (101) is connected with an aeration device through a pipeline and sprays air or air containing ozone into the sewage in the ditch (100).

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