Stacked modified oyster shell biological filter material sewage purification device

Abstract

The invention belongs to the technical field of sewage treatment equipment, and discloses a stacked modified oyster shell biological filter material sewage purification device which comprises an oyster shell biological filter material filtering part, a stacked mixed filter element part, a mixing part, a magnetic booster pump and a pollutant treatment part which are arranged in sequence, pVC (polyvinyl chloride) hoses are communicated between the adjacent parts, the biological filter material filtering part is further communicated with an ingress pipe, and the pollutant treatment part is further communicated with an eduction pipe. According to the invention, sewage treatment can be realized, so that the treated sewage reaches the discharge standard, and the whole equipment occupies a small area and is convenient to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment equipment, and particularly relates to a stacked modified oyster shell biological filter sewage purification device. Background Art

[0002] The main pollution indicators of the national surface water environment quality are chemical oxygen demand, total phosphorus, and permanganate index. These pollution indicators will damage the balance of the water ecosystem, leading to water eutrophication; they will also cause serious pollution to the soil, affect plant growth, and pose threats to human health and the environment. Therefore, at present, circulating water treatment systems will be configured in factories, breeding bases, etc. where the pollution is relatively serious to reduce the pollution sources in the discharged water.

[0006] The currently commonly used circulating water treatment system configuration includes sedimentation tanks, aeration tanks, biological filters, filters, disinfection devices, and oxygenation equipment. The entire system has a long process, many structures, a large floor area, a high cost, a high operating cost, and low efficiency. It cannot achieve the problem of being green and pollution-free, and it is difficult to be widely promoted and applied on a large scale. Summary of the Invention

[0007] The present invention aims to provide a stacked modified oyster shell biological filter sewage purification device, and the present invention aims to solve the technical problems existing in the prior art.

[0008] To achieve the above object, the present invention provides the following technical solutions, including an oyster shell biological filter filtration part, a stacked mixed filter element part, a mixing part, a magnetic booster pump, and a pollutant treatment part arranged in sequence; PVC hoses are connected between adjacent parts, and an inlet pipe is also connected to the biological filter filtration part, and an outlet pipe is also connected to the pollutant treatment part.

[0009] In another preferred embodiment of the present invention, the oyster shell biological filter filtration part includes a cylindrical outer shell and a filter element arranged inside the outer shell. The filter element includes an outer mesh bag and modified oyster shells placed inside the mesh bag; the bottom of the outer shell is threadedly connected with a tray bottom, and a swivel joint is arranged at the top of the outer shell. The swivel joint is respectively connected to the inlet pipe and the PVC hose. By threadedly connecting the tray bottom with the outer shell, it is convenient to disassemble and replace, and the outer shell can resist seawater corrosion, rust, is flexible, and environmentally friendly.

[0010] In another preferred embodiment of the present invention, the stacked mixed water filtration part also includes an outer shell and a cylindrical filter element. The filter element includes modified oyster shell powder, zeolite, shale ceramsite, expanded vermiculite, and fly ash ceramsite mixed in a weight ratio of 1:1:1:1:1. By setting the filter element, elements such as nitrogen and phosphorus that cause water eutrophication can be removed.

[0011] In another preferred embodiment of the present invention, the mixing part also includes a housing and a cylindrical filter element. The filter element includes polyaluminum chloride and modified oyster shell powder mixed in a weight ratio of 1.1:1 - 2:3. The filter element also includes an adhesive, and the adhesive used is sodium silicate nonahydrate, and the ratio of sodium silicate nonahydrate to modified oyster shell powder is 1:1 - 1:0.5. By setting the filter element, the filtering effect can be improved.

[0012] In another preferred embodiment of the present invention, the preparation method of the modified oyster shell powder is as follows: using oyster shell powder and FeCl3·6H2O as raw materials, taking a certain amount of FeCl3·6H2O and dissolving it in 500 mL of water, then adjusting the pH to 8 - 10 with 0.48 mol / L of NaCO3; then adding 40 - 50 g of oyster shell powder, and stirring at 25 - 30 °C for 24 h and then filtering; repeating the washing of the filter residue 3 times with 100 - 120 mL of deionized water, drying at 105 °C for 2 - 3 h after washing, and finally putting it into a muffle furnace and calcining at a high temperature of 700 - 800 °C for 1 - 1.5 h, and sieving after cooling to obtain the modified oyster shell powder.

[0013] In another preferred embodiment of the present invention, when making the filter element of the mixing part, first mix polyaluminum chloride and modified oyster shell powder in proportion, then use sodium silicate nonahydrate to bond polyaluminum chloride and modified oyster shell powder into a cylindrical shape, and finally place it in a muffle furnace and calcine at a high temperature of 700 - 800 °C for 6 h to form the filter element. Through the research on the preparation of the filter element, the compressive strength of the filter element can be improved.

[0014] In another preferred embodiment of the present invention, the pollutant treatment part includes a housing made of stainless steel, and its thickness is 3 - 6 mm. It is corrosion-resistant, has high strength, and is wear-resistant.

[0015] Advantages of the present invention:

[0016] 1. The present invention has three - stage filtration. The first stage is oyster shell sand filtration, the second stage is laminated mixed filter element filtration, and the third stage is polyaluminum chloride mixed filter element filtration. All use recyclable domestic waste as raw materials, so that the filter element is environmentally friendly and reusable.

[0017] 2. A large amount of modified oyster shell powder is used in the filter element material of the present invention. Compared with similar water - filtering devices using oyster shell powder for filtration, the removal rate of elements such as nitrogen and phosphorus by the modified oyster shell powder can be as high as over 90%, improving the sewage treatment effect.

[0018] 3. The present invention uses a magnetic pump as the power, and can filter 150 - 200 L of water per hour, with high water - filtering efficiency.

[0019] 4. The pH of the sewage treated by the present invention is 6.5 - 8.5, meeting the national discharge standards.

[0020] In summary, through three - stage filtration, the present invention can improve the filtration effect of sewage, remove high - nutrient salts and impurities in the sewage, and make the sewage meet the national discharge standards. Moreover, compared with the existing circulating water treatment system, the equipment is smaller, occupies less land, and is convenient to operate; and the raw materials of the filter element are all recycled items, with low cost and recyclability, resulting in low construction cost and low operating cost. It can be widely promoted and used, and can be widely applied in various aquaculture and industrial fields.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above - mentioned and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a schematic structural diagram of an embodiment of the present application.

[0024] Figure 2 is a longitudinal sectional view of the filter element of the oyster shell biological filter media filtering part in an embodiment of the present application.

[0025] Figure 3 is a longitudinal sectional view of the filter element of the laminated mixed water filtering part in an embodiment of the present application.

[0026] Figure 4 is a longitudinal sectional view of the filter element of the mixing part in an embodiment of the present application.

[0027] Figure 5 is a longitudinal sectional view of the pollutant treatment part in an embodiment of the present application.

[0028] Reference numerals in the accompanying drawings of the specification include: oyster shell biological filter media filtering part 1, laminated mixed filter element part 2, mixing part 3, magnetic booster pump 4, pollutant treatment part 5, disc 6, housing 7, gate 8, partition 9, export 10, scraper 11, first rack 12, first gear 13, export plate 14, diversion hole 15, scraping block 16, first magnet block 17, second magnet block 18, baffle 19, top block 20, second gear 21, second rack 22, discharge pipe 23. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0031] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] The present invention provides a stacked modified oyster shell biological filter sewage purification device, as Figure 1 shown, which includes a main body. On the main body, an oyster shell biological filter filtration part 1, a stacked mixed filter element part 2, a mixing part 3, a magnetic force booster pump 4, and a pollutant treatment part 5 are sequentially connected in communication. The adjacent components are connected in communication by arranging PVC hoses. The main body includes two discs 6 with a thickness of 3 - 4 mm. The two discs 6 are vertically overlapped. It also includes 4 columns with a radius of 2 - 5 cm. The two ends of the columns are respectively welded to the two discs 6. The discs 6 and the main body are both made of stainless steel of material 361.

[0033] The oyster shell biological filter filtration part 1, the stacked mixed filter element part 2, and the mixing part 3 all include a cylindrical outer shell and a filter element arranged inside the outer shell. The outer shells are all stainless steel barrels. The outer shell includes a barrel body and a top cover. The top cover is threadedly connected to the barrel body. The top cover is fixed to the top disc 6 through high-strength bolts. A connector is provided on each top cover. An inlet pipe and a PVC hose are connected to the connector of the oyster shell biological filter filtration part 1, and both the inlet pipe and the PVC hose are in communication with the outer shell. The PVC hose connected to the oyster shell biological filter filtration part 1 is in communication with the connector of the stacked mixed water filtration part; the connectors of adjacent components are in communication through PVC hoses.

[0034] Combined with Figure 2 shown, the filter element of the oyster shell biological filter filtration part 1 includes an outer mesh bag and modified oyster shells placed inside the mesh bag.

[0035] Combined with Figure 3 shown, the filter element of the stacked mixed water filtration part includes modified oyster shell powder, zeolite, shale ceramsite, expanded vermiculite, and fly ash ceramsite mixed in a weight ratio of 1:1:1:1:1.

[0036] Combined Figure 4 As shown, the filter element of the mixing part 3 includes polyaluminum chloride and modified oyster shell powder mixed in a weight ratio of 1.1:1 - 2:3. The filter element also includes an adhesive, and the adhesive used is sodium silicate nonahydrate; the ratio of sodium silicate nonahydrate to modified oyster shell powder is 1:1 - 1:0.5. When manufacturing the filter element of the mixing part 3, first mix polyaluminum chloride and modified oyster shell powder in proportion, then use sodium silicate nonahydrate to bond polyaluminum chloride and modified oyster shell powder into a cylindrical shape, and finally place it in a muffle furnace for high-temperature calcination to form the filter element.

[0037] The preparation method of the modified oyster shell powder is as follows: using oyster shell powder and FeCl3·6H2O as raw materials, take 8 - 10 g of FeCl3·6H2O and dissolve it in 500 mL of water, then adjust the pH to 8 - 10 with 0.48 mol / L of NaCO3; then add 40 - 50 g of oyster shell powder, and stir at 25 - 30 °C for 24 h and then filter; repeat washing the filter residue 3 times with 100 - 120 mL of deionized water, dry it at 105 °C for 2 - 3 h after washing, and finally put it into a muffle furnace and calcine it at 700 - 800 °C for 1 - 1.5 h, and sieve it after cooling to obtain the modified oyster shell powder.

[0038] The magnetic boosting pump 4 uses the QHX - 663 model, which includes a pump body, an impeller, a bearing, a magnetic drive (magnetic cylinder, isolation sleeve) and a motor. The impeller yaw of the magnetic boosting pump 4 is less than 0.2 mm, and the head and flow rate are stable; the motor adopts intelligent microelectronics real-time online monitoring technology, which can realize rapid open-circuit protection for liquid shortage and no-load, overload, and phase loss; its rated power is 2.2 kw, the rated flow rate is 63 m3 / h, the rated head is 17 m, and the voltage is 380V.

[0039] The pollutant treatment part 5 includes a shell 7 made of stainless steel, with a thickness of 3 - 6 mm. A gate 8 is provided on the side of the shell 7, which can facilitate the removal of waste particulate pollutants. A lead-out pipe is also connected to the pollutant treatment part 5, and both the lead-in pipe and the lead-out pipe use PVC hoses.

[0040] Combined Figure 5 As shown, a vertical partition 9 is provided on the left part inside the shell 7. A lead-out port 10 is provided above the partition 9, and the bottom of the lead-out port 10 is inclined downward from right to left. A vertical scraper 11 is arranged inside the left part of the shell 7, and a first rack 12 is fixed to the top of the scraper 11. A bracket is provided on the top of the shell 7, and a first gear 13 is rotatably connected to the bracket. The first rack 12 meshes with the first gear 13, and a first motor is also fixed to the bracket. The output shaft of the first motor is coaxially fixed with the first gear 13. The gate 8 is arranged at the lower left side of the shell 7 to facilitate the export of impurities.

[0041] An outlet plate 14 is provided in the right part of the housing 7, a support block is provided at the lower part of the housing 7, the outlet plate 14 is placed on the support block, and the outer periphery of the outlet plate 14 is respectively attached to the inner wall of the housing 7. A guide hole 15 is provided at the right part of the outlet plate 14, the upper surface of the outlet plate 14 is tilted downward from right to left, and a scraper block 16 is slidably connected to the upper surface of the outlet plate 14 in a transverse direction. The scraper block 16 is a magnetic block, and a first magnet block 17 that attracts the scraper block 16 is provided on the right side wall of the lower part of the housing 7, and a second magnet block 18 that attracts the scraper block 16 is provided on the upper part of the left side wall of the housing 7.

[0042] The housing 7 also includes a baffle 19 that penetrates the upper surface of the housing 7. The baffle 19 is attached to the right side of the partition 9. A top block 20 is fixed to the left end of the outlet plate 14. The top block 20 is located below the baffle 19.

[0043] Second racks 22 are fixed to both the front and rear sides of the export plate 14, and a second motor is also fixed to the bracket. A rotating shaft is fixed to the output shaft of the second motor, and two second gears 21 are coaxially fixed to the rotating shaft. The two second gears 21 are respectively meshed with the two second racks 22.

[0044] The bottom of the shell 7 is also provided with a discharge port, which is connected to a discharge pipe 23 , and a discharge valve is provided in the discharge pipe 23 .

[0045] The specific implementation process is as follows:

[0046] The sewage to be treated enters the oyster shell biological filter material filter part 1 through the inlet pipe, and is guided by the magnetic booster pump 4 as the power to pass through the stacked mixing filter element part 2 and the mixing part 3 in sequence. In this process, three-stage filtration is completed through the oyster shell biological filter material filter part 1, the stacked mixing filter element part 2, and the mixing part 3; and then it is discharged.

[0047] Since the sewage will still contain some impurities after treatment, it will be deposited in the pollution treatment unit. By starting the second motor and cooperating with the second gear 21 and the second rack 22, the export plate 14 can slide up and down. When the export plate 14 slides upward, it scrapes the impurities on the inner wall of the shell 7 until the export plate 14 moves to the position of the export port 10. At this time, the second magnet block 18 attracts the scraper block 16 and scrapes the impurities on the upper surface of the export plate 14, so that the impurities are introduced to the left side of the partition 9 and then accumulated on the left side of the partition 9. After the impurities are exported, the second motor rotates in the opposite direction to achieve the downward sliding of the export plate 14.

[0048] When the accumulated impurities need to be discharged, the first motor drives the first gear 13, and the first gear 13 cooperates with the first rack 12 to realize the up and down movement of the scraper 11, thereby discharging the impurities from the gate 8, thereby realizing the discharge of solid particulate pollutants.

[0049] Through the design of the filter elements of three components, the present invention can achieve the treatment of sewage, remove the elements causing water eutrophication such as nitrogen and phosphorus in the sewage, and at the same time make the treated water meet the national standards. Moreover, the modified oyster shells used in the filter elements are recyclable domestic waste, and the filter elements have the effects of environmental protection and recyclability, and the preparation cost and operation cost of the entire purification device are low.

[0050] Due to the delicate design of its components, the present invention has a relatively simple structure compared with the prior art, so it occupies less space, is convenient to operate, and is also convenient for large-scale promotion.

[0051] In the description of this specification, the description referring to terms such as "preferred embodiments", "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. The stacked modified oyster shell biological filter sewage purification device is characterized in that: It includes an oyster shell biological filter media filtration section, a laminated mixed filter element section, a mixing section, a magnetic booster pump, and a pollutant treatment section; PVC hoses are connected between adjacent sections. The biological filter media filtration section is also connected with an inlet pipe, and the pollutant treatment section is also connected with an outlet pipe.

2. The laminated modified oyster shell biological filter sewage purification device according to claim 1, characterized in that: The oyster shell biological filter media filtration section includes a cylindrical outer shell and a filter element arranged inside the outer shell. The filter element includes an outer mesh bag and modified oyster shells placed inside the mesh bag; the bottom of the outer shell is threadedly connected with a tray bottom, and a swivel joint is arranged at the top of the outer shell. The swivel joint is respectively connected with the inlet pipe and the PVC hose.

3. The stacked modified oyster shell biological filter sewage purification device according to claim 2, characterized in that: The laminated mixed water filtration section also includes an outer shell and a cylindrical filter element. The filter element includes modified oyster shell powder, zeolite, shale ceramsite, expanded vermiculite, and fly ash ceramsite mixed in a weight ratio of 1:1:1:1:

1.

4. The stacked modified oyster shell biological filter sewage purification device according to claim 3, characterized in that: The mixing section also includes an outer shell and a cylindrical filter element. The filter element includes polyaluminum chloride and modified oyster shell powder mixed in a weight ratio of 1.1:1 - 2:

3. The filter element also includes an adhesive, and the adhesive used is sodium silicate nonahydrate, and the ratio of sodium silicate nonahydrate to modified oyster shell powder is 1:1 - 1:0.

5.

5. The stacked modified oyster shell biological filter sewage purification device according to claims 2-4, characterized in that: The preparation method of the modified oyster shell powder is as follows: using oyster shell powder and FeCl3·6H2O as raw materials, take 8 - 10 g of FeCl3·6H2O and dissolve it in 500 mL of water, then adjust the pH to 8 - 10 with 0.48 mol / L of NaCO3; then add 40 - 50 g of oyster shell powder, and stir at 25 - 30 °C for 24 h and then filter; repeat washing the filter residue 3 times with 100 - 120 mL of deionized water, dry it at 105 °C for 2 - 3 h after washing, and finally put it into a muffle furnace and calcine at a high temperature of 700 - 800 °C for 1 - 1.5 h. After cooling, sieve to obtain the modified oyster shell powder.

6. The stacked modified oyster shell biological filter sewage purification device according to claim 5, characterized in that: When making the filter element of the mixing section, first mix polyaluminum chloride and modified oyster shell powder in proportion, then use sodium silicate nonahydrate to bond polyaluminum chloride and modified oyster shell powder into a cylindrical shape, and finally place it in a muffle furnace and calcine at a high temperature of 700 - 800 °C for 6 h to form the filter element.

7. The stacked modified oyster shell biological filter sewage purification device according to claim 6, characterized in that: The pollutant treatment section includes a stainless steel housing with a thickness of 3 - 6 mm.

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