Sewage purification device

Abstract

The utility model provides a sewage purification device, which is used for treating sewage and comprises a regulation and storage tank, a water inlet and an inner cavity are formed in the regulation and storage tank, and the sewage enters the inner cavity from the water inlet; the membrane tank is provided with at least two separation membranes, the two separation membranes divide the membrane tank into a water inlet cavity, a separation cavity and a drainage cavity which are communicated in sequence, the water inlet cavity is communicated with the inner cavity, and the separation membranes are used for separating pollutants in sewage; the filtering tank is communicated with the drainage cavity, a cleaning filter material is arranged in the filtering tank, and the cleaning filter material is used for cleaning the sewage after the sewage in the drainage cavity enters the filtering tank. According to the sewage purification device, the regulation and storage tank and the membrane tank are arranged in front of the filtering tank, sewage is purified in advance through the regulation and storage tank and the membrane tank, most pollutants in the sewage can be cleaned, and then the filtering tank is used for cleaning, so that the sewage reaches the discharge standard.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage purification device. Background Art

[0002] With the development of science and technology, more and more high-tech and chemical products are appearing in our lives. However, during the use of these products, they may produce some environmentally harmful chemicals, including fluoride. When these fluorides enter municipal wastewater through industrial discharge, agricultural irrigation, or household drainage systems, they pose a threat to the environment and human health.

[0003] The existing treatment method involves adding activated alumina filter media to the filtration system. The activated alumina reacts with fluoride ions to form insoluble fluorides, which are then adsorbed and removed by the filter media. However, as pollutants in municipal wastewater continue to increase, the concentration of fluoride ions in the wastewater increases. When using activated alumina filter media to purify the wastewater, the reaction is limited in efficiency, resulting in some fluoride ions remaining in the wastewater, unreacted, and failing to meet discharge standards. This same problem also arises during periods of high water levels or sustained rainfall, when the volume of municipal wastewater increases. Utility Model Content

[0004] The utility model provides a sewage purification device and a use method, which are used to solve the defect in the prior art that fluoride ions in municipal sewage are difficult to remove, and achieve a better municipal sewage cleaning effect.

[0005] The utility model provides a sewage purification device for treating sewage, comprising:

[0006] A regulating storage tank, wherein the regulating storage tank is provided with a water inlet and an inner cavity, and the sewage enters the inner cavity from the water inlet;

[0007] At least one membrane pool, wherein the membrane pool is provided with at least two separation membranes, wherein the two separation membranes separate the membrane pool into a water inlet chamber, a separation chamber, and a drainage chamber that are connected in sequence, wherein the water inlet chamber is connected to the inner chamber, and the separation membranes are used to separate pollutants in the sewage;

[0008] A filter tank is connected to the drainage cavity. A clean filter material is provided in the filter tank. The clean filter material is used to clean the sewage in the drainage cavity after it enters the filter tank.

[0009] According to a sewage purification device provided by the present utility model, the sewage purification device further includes a coagulation sedimentation tank. Both ends of the coagulation sedimentation tank are respectively communicated with the membrane tank and the filtration tank. The coagulation sedimentation tank is also provided with a coagulation sludge discharge port. The coagulation sedimentation tank is used for sedimenting the sewage flowing into the membrane tank, and the sludge discharge port is used for discharging the sediment in the coagulation sedimentation tank.

[0010] According to a sewage purification device provided by the present utility model, the sewage purification device further includes a chemical dosing tank. The chemical dosing tank includes a chemical dosing pipeline and a chemical dosing pump. The chemical dosing tank is communicated with the storage tank, the membrane tank and the coagulation sedimentation tank through the chemical dosing pipeline. The chemical dosing tank contains a cleaning agent, and the chemical dosing pump is used for pumping the cleaning agent through the chemical dosing pipeline to the storage tank, the membrane tank and the coagulation sedimentation tank respectively.

[0011] According to a sewage purification device provided by the present utility model, the sewage purification device further includes a chemical dosing valve. At least one of the connections between the chemical dosing pipeline and the storage tank, between the chemical dosing pipeline and the membrane tank, or between the chemical dosing pipeline and the coagulation sedimentation tank is connected through a chemical dosing valve. The chemical dosing valve is used for controlling the flow direction in the chemical dosing pipeline and monitoring the flow rate in the chemical dosing pipeline.

[0012] According to a sewage purification device provided by the present utility model, the membrane tank further includes cleaning sludge, and the cleaning sludge is used for adsorbing pollutants in the sewage in the membrane tank.

[0013] According to a sewage purification device provided by the present utility model, the sewage purification device further includes a sludge discharge pipeline. The sludge discharge pipeline is communicated with the membrane tank and is used for discharging the sludge in the membrane tank.

[0014] According to a sewage purification device provided by the present utility model, the sewage purification device further includes a booster pump. The booster pump is connected to the sludge discharge pipeline, and the booster pump is used for discharging the sludge in the sludge discharge pipeline.

[0015] According to a sewage purification device provided by the present utility model, the inner cavity is divided into a grid tank and a sump. A filter screen is provided in the grid tank, and the filter screen is used for filtering the sewage flowing from the grid tank to the sump.

[0016] According to a sewage purification device provided by the present utility model, a submersible blower is further provided in the grid tank. The submersible blower is arranged at the bottom of the grid tank and is used for driving the sewage in the grid tank to flow to the sump.

[0017] According to a sewage purification device provided by the present utility model, a gate is further provided in the grid tank, and the gate is used for opening or closing the grid tank.

[0018] A sewage purification device provided by the present utility model can treat sewage in advance through a regulating pond and a membrane pond, which can purify most pollutants in the sewage and also remove fluoride ions in the sewage. When the sewage flows from the membrane pond into the filter tank, the filter tank conducts cleaning filtration to remove the remaining fluoride ions in the sewage. In this case, through three times of cleaning filtration by the regulating pond, the membrane pond and the filter tank, most pollutants in the sewage are cleaned, so that the sewage flowing out of the filter tank meets the discharge standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the sewage purification device provided by the present utility model.

[0021] Figure 2 It is a schematic diagram of the sewage purification device provided by another embodiment of the present utility model.

[0022] Reference numerals:

[0023] 1. Regulating pond; 11. Inlet; 12. Inner cavity; 121. Grid pond; 122. Sump; 123. Filter screen; 124. Submerged blower; 13. First output pump;

[0024] 2. Membrane pond; 21. Separation membrane; 22. Inlet cavity; 23. Separation cavity; 24. Drainage cavity;

[0025] 3. Filter tank;

[0026] 4. Coagulation sedimentation tank; 41. Sludge discharge port;

[0027] 5. Chemical dosing tank; 51. Chemical dosing pipeline; 52. Chemical dosing pump; 53. Chemical dosing valve;

[0028] 6. Sludge discharge pipeline;

[0029] 7. Booster pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will clearly and completely describe the technical solutions in the present utility model with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without any creative work belong to the scope of protection of the present utility model.

[0031] The following will describe a sewage purification device of the present utility model in conjunction with Figure 1 which includes a storage tank 1, a membrane tank 2, and a filter tank 3. The storage tank 1 is provided with a water inlet 11, an inner cavity 12, and a first output pump 13. The water inlet 11 of the storage tank 1 is used to connect to the water outlet of the sewage. Usually, municipal sewage is collected through the municipal drainage system and then all flows into the main river. Then, it is only necessary to align and connect the main river with the water inlet 11. The municipal sewage flows along the main river to the water inlet 11 and then flows into the inner cavity 12 through the water inlet 11. Further, some sewage may also be transported by equipment such as a transport vehicle. Then, it is only necessary to align and connect the drainage outlet of the transport vehicle and other mechanisms with the water inlet 11. After the sewage enters the inner cavity 12, it will first settle and precipitate in the inner cavity 12. This is the first step of the cleaning work, which can remove pollutants with larger volume and mass in the sewage.

[0032] A first output pump 13 is arranged in the inner cavity 12. The first output pump 13 is used to output the sewage in the inner cavity 12. Since only simple purification treatment is carried out on the sewage in the inner cavity 12 and the purification intensity is not enough, and there are still many pollutants in the sewage, the output end of the first output pump 13 is communicated with the membrane tank 2 through a pipeline. After starting the first output pump 13, the first output pump 13 outputs the sewage in the inner cavity 12 to the inside of the membrane tank 2.

[0033] The sewage in the membrane tank 2 is purified by the separation membranes 21. Therefore, the membrane tank 2 is provided with a plurality of separation membranes 21, so as to realize multiple purification operations on the sewage. As Figure 1 shown, in this embodiment, two separation membranes 21 are taken as an example. The two separation membranes 21 divide the membrane tank 2 into a sequentially connected water inlet chamber 22, a separation chamber 23, and a drainage chamber 24. Then, the output end of the first output pump 13 is communicated with the water inlet chamber 22 through a pipeline. The first output pump 13 outputs the sewage in the inner cavity 12 to the inside of the water inlet chamber 22. The sewage entering the water inlet chamber 22 will flow into the separation chamber 23. Since the water inlet chamber 22 and the separation chamber 23 are separated by the separation membrane 21, when the sewage flows from the water inlet chamber 22 into the separation chamber 23, it will pass through the separation membrane 21. Under the separation action of the separation membrane 21, the pollutants in the sewage can be separated out.

[0034] Further, since this embodiment mainly focuses on the removal of fluoride ions in sewage, the MBR membrane separation technology is used for defluorination in this embodiment. The membrane separation method enables the fluoride ions in the sewage to pass through the semi-permeable membrane for sieve-hole liquid-phase separation under the action of different pressure-difference external thrusts, thereby achieving the removal of fluoride ions in the sewage. In other embodiments, separation membranes with different functions can also be used for treatment to remove different pollutants in the sewage. In the case of more pollutants in the sewage, multiple separation membranes can also be sequentially arranged inside the membrane tank according to the actual situation and the ion separation process for sequential separation, and the polluted ions in the sewage can be separated in sequence.

[0035] When the sewage enters the separation chamber 23 and is separated under the action of the separation membrane 21, insoluble compounds may be generated. At the same time, since there are many pollutants in the sewage, it is difficult to completely remove the pollutants in the sewage through a single separation by the separation membrane 21. Therefore, a separation membrane 21 is also provided between the separation chamber 23 and the drainage chamber 24. When the sewage in the separation chamber 23 enters the drainage chamber 24, it is separated by the separation membrane 21 again, and the sewage entering the drainage chamber 24 is ensured to be cleaner under the separation action of the separation membrane 21.

[0036] Further, the drainage chamber 24 is communicated with the filtration tank 3, and the sewage that has been separated and filtered by the separation membrane 21 multiple times in the membrane tank 2 flows into the filtration tank 3 from the drainage chamber 24. Filter media are added inside the filtration tank 3. Since this embodiment mainly focuses on the removal of fluoride ions in the sewage, the filter media added inside the filtration tank 3 are activated alumina filter media. When the sewage enters the filtration tank 3 from the drainage chamber 24, at this time, the fluoride ion content in the sewage is relatively low under the filtration of the membrane tank 2. Then, there are enough activated alumina filter media in the filtration tank 3 for reaction, and the fluoride ions in the sewage can be removed.

[0037] In this embodiment, through the preliminary filtration and purification of the storage tank 1 and the membrane tank 2, the content of pollutants in the sewage entering the filtration tank 3 is relatively low, enabling the filtration tank 3 to have sufficient purification capacity to purify the sewage. In this embodiment, a variety of different ways of filtering and purifying sewage are formed by the storage tank 1, the membrane tank 2, and the filtration tank 3, improving the purification capacity for different sewage.

[0038] Further, in this embodiment, one membrane tank 2 and one filtration tank 3 are taken as examples. In different embodiments, the number of membrane tanks 2 and filtration tanks 3 can be appropriately increased according to the actual water volume of the sewage. At the same time, multiple membrane tanks 2 can be connected in parallel or in series. When multiple membrane tanks 2 are connected in parallel, the sewage treatment volume at the same time can be increased; when multiple membrane tanks 2 are connected in series, each membrane tank 2 can separate different pollutants, thereby improving the ability to purify sewage.

[0039] Such as Figure 2As shown, an embodiment with four membrane tanks 2 is provided. In Figure 2 this embodiment, the four membrane tanks 2 are connected in parallel with each other, so as to increase the sewage treatment capacity of the entire sewage purification device at the same time.

[0040] Please refer to Figure 1 , in this embodiment, a coagulation sedimentation tank 4 is further provided between the membrane tank 2 and the filtration tank 3, which further improves the sewage purification ability. The sewage flowing out from the drainage cavity 24 first enters the coagulation sedimentation tank 4, and is sedimented again in the coagulation sedimentation tank 4. The insoluble substances generated by the reaction in the sewage are sedimented in the coagulation sedimentation tank 4, and then enter the filtration tank 3 from the coagulation sedimentation tank 4, reducing the pollutant content in the sewage when it enters the filtration tank 3.

[0041] Furthermore, in order to improve the purification ability of the sewage purification device, a chemical dosing tank 5 is also provided in this embodiment. The chemical dosing tank 5 is connected to the storage tank 1, the membrane tank 2 and the coagulation sedimentation tank 4 through a chemical dosing pipeline 51, and then is driven by a chemical dosing pump 52 to transport the cleaning agent in the chemical dosing tank 5 to the corresponding tank. Because the functions of the storage tank 1, the membrane tank 2 and the coagulation sedimentation tank 4 are different, and the sewage to be treated among them is also different, the chemical dosing tank 5 can be divided into multiple different chemical storage chambers to provide corresponding cleaning agents for different needs. Specifically, according to the high or low pollutant content in the sewage, different agents can be added for purification treatment. For example, in the storage tank 1 and the membrane tank 2, defluorination is achieved by adding chemicals for coagulation and sedimentation, while in the coagulation sedimentation tank 4, phosphorus removal agents and defluorination agents are added.

[0042] At the same time, a chemical dosing valve 53 is also provided on the chemical dosing pipeline 51. In this embodiment, chemical dosing valves 53 are provided between the chemical dosing pipeline 51 and the storage tank 1, between the chemical dosing pipeline 51 and the membrane tank 2, and between the chemical dosing pipeline 51 and the coagulation sedimentation tank 4. Because the substances in the storage tank 1, the membrane tank 2 and the coagulation sedimentation tank 4 are sewage, in order to prevent the sewage from flowing into the chemical dosing tank 5 and polluting the cleaning agent in the chemical dosing tank 5, the chemical dosing valve 53 is designed as a one-way valve to prevent the sewage from flowing back. Furthermore, in order to more accurately monitor the dosage of the cleaning agent added, a monitoring device is also provided on the chemical dosing valve 53, which can record the flow rate in the chemical dosing pipeline 51 in real time.

[0043] Furthermore, in order to improve the purification ability of the membrane tank 2, cleaning mud is added inside the membrane tank 2. Because in this embodiment, it is aimed at the fluoride ions in the sewage, the cleaning mud in the membrane tank 2 is activated sludge, and the activated sludge is used to adsorb the fluoride-containing sludge to achieve the defluorination effect.

[0044] Please refer to Figure 1, in this embodiment, there is also a sludge discharge pipeline 6 and a booster pump 7 provided at the end of the sludge discharge pipeline 6. The sludge discharge pipeline 6 is communicated with the membrane tank 2, so as to discharge the activated sludge adsorbed with fluorine-containing sludge in the membrane tank 2, and ensure that the activated sludge in the membrane tank 2 can continuously carry out the cleaning work.

[0045] Specifically, since there are sediment pollutants in both the storage tank 1 and the coagulation sedimentation tank 4, in this embodiment, the sludge discharge pipeline 6 is provided with a total of three sludge discharge inlets, which are respectively communicated with the storage tank 1, the membrane tank 2, and the coagulation sedimentation tank 4, so as to discharge the sediment or pollutants in the storage tank 1, the membrane tank 2, and the coagulation sedimentation tank 4. At the same time, a booster pump 7 is also provided at the end of the sludge discharge pipeline 6. Since the sediment and sludge have poor fluidity and slow flow rate, the booster pump 7 provides power to quickly discharge the sediment and sludge in the sludge discharge pipeline 6.

[0046] As Figure 1 shown, the inner cavity 12 is divided into a grid tank 121 and a sump 122, and a plurality of filter meshes 123 are also provided in the grid tank 121. In this embodiment, taking two filter meshes 123 as an example, they are respectively a coarse grid and a fine grid. At the same time, a gate 125 is also provided in the grid tank 121 to control the inflow of sewage. The sewage entering from the water inlet 11 is first blocked by the gate 125. When the gate 125 is opened, the inflowing sewage can filter out large-volume pollutants under the filtration of the coarse grid and the fine grid, and then flow into the sump 122 through the second gate 125.

[0047] Furthermore, a submersible blower 124 is also provided at the bottom of the grid tank 121. The driving of the submersible blower 124 can accelerate the flow rate of the sewage. At the same time, the submersible blower 124 works directly immersed in the water, and provides the necessary oxygen by injecting air into the water, so as to maintain and accelerate the biodegradation process of microorganisms, and further improve the ability to purify sewage.

[0048] In another embodiment of the present application, a usage method of the sewage defluorination device is also provided. The usage method of the sewage defluorination device is used for the sewage defluorination device as described above:

[0049] Connect the drain outlet of the sewage to the communicating water inlet 11 of the storage tank 1 to make the sewage enter the storage tank 1, and start the first output pump 13;

[0050] Start the chemical dosing tank 5, and add the cleaning agent into the storage tank 1, the membrane tank 2, and the coagulation sedimentation tank 4 through the chemical dosing tank 5 to clean the sewage;

[0051] Start the booster pump 7 to discharge the sludge in the membrane tank 2 through the sludge discharge pipeline 6;

[0052] Detect the sewage in the filter tank 3 and the sludge in the sludge discharge pipeline 6;

[0053] When the sewage in the filtration tank 3 is detected to be qualified, the sewage in the filtration tank 3 is discharged into the river.

[0054] In the usage method of this sewage defluorination device, by detecting the sewage in the filtration tank 3 and the sludge in the sludge discharge pipeline 6, it is possible to judge whether the sewage purification result meets the expectation. At the same time, when the adsorption efficiency of the activated sludge in the membrane tank 2 decreases, it can also be reflected by regular detection, so as to timely drain the activated sludge and add new activated sludge to ensure the purification efficiency.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sewage purification device for treating sewage, characterized in that, Comprising: A storage tank (1), the storage tank (1) is provided with a water inlet (11) and an inner cavity (12), and the sewage enters the inner cavity (12) from the water inlet (11); At least one membrane tank (2), the membrane tank (2) is provided with at least two separation membranes (21), and the two separation membranes (21) divide the membrane tank (2) into a sequentially connected water inlet chamber (22), a separation chamber (23) and a drainage chamber (24), wherein the water inlet chamber (22) is communicated with the inner cavity (12), and the separation membrane (21) is used for separating pollutants in the sewage; A filter tank (3), the filter tank (3) is communicated with the drainage chamber (24), and a clean filter material is arranged in the filter tank (3), and the clean filter material is used for cleaning the sewage after the sewage in the drainage chamber (24) enters the filter tank (3).

2. The sewage purification device according to claim 1, wherein, The sewage purification device further includes a coagulation sedimentation tank (4), both ends of the coagulation sedimentation tank (4) are respectively communicated with the membrane tank (2) and the filter tank (3), the coagulation sedimentation tank (4) is further provided with a coagulation sludge discharge port (41), the coagulation sedimentation tank (4) is used for sedimenting the sewage flowing in from the membrane tank (2), and the sludge discharge port (41) is used for discharging the sediment in the coagulation sedimentation tank (4).

3. The sewage purification device according to claim 2, wherein The sewage purification device further includes a chemical dosing tank (5), the chemical dosing tank (5) includes a chemical dosing pipeline (51) and a chemical dosing pump (52), the chemical dosing tank (5) is communicated with the storage tank (1), the membrane tank (2) and the coagulation sedimentation tank (4) through the chemical dosing pipeline (51), the chemical dosing tank (5) contains a cleaning chemical agent, and the chemical dosing pump (52) is used for pumping the cleaning chemical agent into the storage tank (1), the membrane tank (2) and the coagulation sedimentation tank (4) respectively through the chemical dosing pipeline (51).

4. The sewage purification device according to claim 3, characterized in that, The sewage purification device further includes a chemical dosing valve (53), at least one of the connection between the chemical dosing pipeline (51) and the storage tank (1), the connection between the chemical dosing pipeline (51) and the membrane tank (2) or the connection between the chemical dosing pipeline (51) and the coagulation sedimentation tank (4) is connected through the chemical dosing valve (53), and the chemical dosing valve (53) is used for controlling the flow direction in the chemical dosing pipeline (51) and monitoring the flow rate in the chemical dosing pipeline (51).

5. The sewage purification device according to claim 1, characterized in that, The membrane tank (2) further includes cleaning mud, and the cleaning mud is used for adsorbing pollutants in the sewage in the membrane tank (2).

6. The sewage purification device according to claim 5, characterized in that, The sewage purification device further includes a sludge discharge pipeline (6), the sludge discharge pipeline (6) is communicated with the membrane tank (2) and is used for discharging the sludge in the membrane tank (2).

7. The sewage purification device according to claim 6, characterized in that, The sewage purification device further includes a booster pump (7), the booster pump (7) is connected to the sludge discharge pipeline (6), and the booster pump (7) is used for discharging the sludge in the sludge discharge pipeline (6).

8. The sewage purification device according to claim 1, characterized in that, The inner cavity (12) is divided into a grille tank (121) and a sump (122), a filter net (123) is arranged in the grille tank (121), and the filter net (123) is used for filtering the sewage flowing from the grille tank (121) to the sump (122).

9. The sewage purification device according to claim 8, characterized in that, A submersible blower (124) is further provided in the grid tank (121), and the submersible blower (124) is arranged at the bottom of the grid tank (121) and is used for driving the sewage in the grid tank (121) to flow towards the sump (122).

10. The sewage purification device according to claim 8, wherein, A gate (125) is further provided in the grid tank (121), and the gate (125) is used for opening or closing the grid tank (121).

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