CN111072136B - Composite biological filter material for biological aerated filter - Google Patents
Composite biological filter material for biological aerated filter Download PDFInfo
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- CN111072136B CN111072136B CN201911393601.2A CN201911393601A CN111072136B CN 111072136 B CN111072136 B CN 111072136B CN 201911393601 A CN201911393601 A CN 201911393601A CN 111072136 B CN111072136 B CN 111072136B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/106—Carbonaceous materials
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention relates to the technical field of biological filter materials, in particular to a composite biological filter material for an aeration biological filter, which comprises an outer cylinder body and an inner cylinder body, wherein the outer cylinder body and the inner cylinder body are connected through a connecting rod; in the invention, the vermiculite, the ceramsite and the fiber filter material are used as the filter material, and the vermiculite and the ceramsite are placed in the inner cylinder, so that the contact time of the sewage with the vermiculite and the ceramsite is prolonged, the contact area of the sewage with the vermiculite and the ceramsite is increased, and the water treatment efficiency is higher.
Description
Technical Field
The invention relates to the technical field of biological filter materials, in particular to a composite biological filter material for a biological aerated filter.
Background
The sewage in the aeration biological filter tank passes through the filter material layer, the pollutants contained in the water body are intercepted by the filter material layer and are degraded and converted by the organisms attached to the filter material, meanwhile, the organic matters and the specific substances in the dissolved state are also removed, the generated sludge is kept in the filter layer, and only the purified water passes through, so that the complete biological treatment can be achieved in a closed reactor without arranging a secondary sedimentation tank at the downstream for sludge sedimentation.
Disclose a biological aerated filter in the patent 201710520888.5, wherein disclose a biofilm carrier, fill out cloth biofilm carrier (4) between one-level filter plate (2) and second grade filter plate (3), pack small granule filter material (5) above one-level filter plate (2), small granule filter material (5) are granule active carbon, volcanic filter stone, haydite or slag, and its technical problem that solve provides a microorganism and sewage contact fully even, the biological filter material that treatment effeciency and microorganism utilization are high, but what its adopted is the biological filter material that the granule is tiny, and the problem that the biological filter material that the granule is tiny exists is that the granule is tiny, arranges between the granule more compacter to just reduced the clearance between the granule, can reduce the biofilm carrier volume, thereby reduced sewage treatment efficiency.
Disclosure of Invention
The purpose of the invention is: overcomes the defects in the prior art, and provides a composite biological filter material for an aeration biological filter, which has large membrane hanging amount and high sewage treatment efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a compound biofilter material for bological aerated filter, includes outer barrel and interior barrel, connect through the connecting rod between outer barrel and the interior barrel, it has a plurality of outer through-holes and interior through-hole to open respectively on outer barrel and the interior barrel, and the position of the interior through-hole on outer through-hole on the outer barrel and the interior barrel is the one-to-one, be provided with the fiber filter material between outer through-hole and the interior through-hole, in the through-hole including the fiber filter material is fixed, pass outer barrel through outer through-hole, the inside of interior barrel is provided with vermiculite and haydite, the both ends of interior barrel are provided with the baffle, and it has a plurality of inlet openings or apopore to open respectively on two baffles.
Furthermore, the fiber filter material is connected with the inner through hole through a connecting plate, the fiber filter material is connected with the connecting plate through an elastic connecting ring, and the connecting plate is connected with the inner through hole through threads.
Furthermore, a rotating mechanism is arranged on one surface of the connecting plate, which is close to the outer cylinder body.
Furthermore, the rotating mechanism is a clamping plate, the clamping plate and the connecting plate are of an integrated structure, a groove is formed in the connecting plate, and the height of the clamping plate is consistent with the depth of the groove.
Furthermore, the longitudinal section of the groove is arc-shaped.
Furthermore, the fiber filter material comprises a plurality of graphene fiber strips, the graphene carbon fiber strips comprise connecting ropes and graphene carbon fibers, the graphene carbon fibers are fixed on the connecting ropes, and the graphene carbon fibers are perpendicular to the connecting ropes.
Furthermore, the connecting rope comprises an aluminum core material and a corrosion-resistant plastic layer coated on the surface of the aluminum core material.
Furthermore, structure as an organic whole between connecting rod and the interior barrel, pass through the nut connection between connecting rod and the outer barrel.
Further, it has a plurality of connecting rod fixed orificess to open on the outer barrel, the tip of connecting rod has one section screw thread section, and outer barrel and interior barrel cover are established the back, and the compensation threaded rod is connected with the connecting rod, and the connecting hole is stretched out at the top of compensation threaded rod to realize being connected between outer barrel and the interior barrel.
The technical scheme adopted by the invention has the beneficial effects that:
in the invention, the vermiculite, the ceramsite and the fiber filter material are used as the filter material, and the vermiculite and the ceramsite are placed in the inner cylinder, so that the contact time of the sewage with the vermiculite and the ceramsite is prolonged, the contact area of the sewage with the vermiculite and the ceramsite is increased, and the water treatment efficiency is higher.
According to the structure, the outer barrel body and the inner barrel body are high in mounting and dismounting efficiency, and the compensation threaded rod is arranged, so that the outer barrel body can be stably sleeved on the inner barrel body and cannot fall off.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein the content of the first and second substances,
FIG. 1 is a schematic structural diagram of a composite biological filter material for a biological aerated filter.
FIG. 2 is a schematic side view of a composite biological filter material for a biological aerated filter.
In the figure: the device comprises an outer cylinder body 1, an inner cylinder body 2, a connecting rod 3, a fiber filter material 4 and an outer through hole 5.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Referring to fig. 1 and 2, a composite biological filter material for a biological aerated filter comprises an outer cylinder 1 and an inner cylinder 2, wherein the outer cylinder 1 and the inner cylinder 2 are connected through a connecting rod 3, the outer cylinder 1 and the inner cylinder 2 are respectively provided with a plurality of outer through holes 5 and inner through holes, the outer through holes 5 on the outer cylinder 1 and the inner through holes on the inner cylinder 2 are in one-to-one correspondence, a fiber filter material 4 is arranged between the outer through holes 5 and the inner through holes, the fiber filter material 4 is fixed in the inner through holes and penetrates through the outer cylinder 1 through the outer through holes 5, the inner through holes are used for fixing the fiber filter material 4, the outer through holes 5 limit the fiber filter material 4, vermiculite and ceramsite are arranged in the inner cylinder 2, two ends of the inner cylinder 2 are provided with baffles, the two baffles are respectively provided with a plurality of water inlet holes or water outlet holes, and the three materials of the vermiculite, the ceramsite and the fiber filter material 4 are used as filter materials, the water treatment efficiency is higher.
As a preferred embodiment, the fiber filter material 4 in this embodiment is connected to the inner through hole through a connecting plate, the fiber filter material 4 is connected to the connecting plate through an elastic connecting ring, and the connecting plate is connected to the inner through hole through a screw thread.
As a preferred embodiment, a rotating mechanism is disposed on one surface of the connecting plate in the present embodiment, which is close to the outer cylinder 1.
As a preferred embodiment, the rotating mechanism in this embodiment is a clamping plate, the clamping plate and the connecting plate are of an integral structure, the connecting plate is provided with a groove, and the height of the clamping plate is consistent with the depth of the groove.
As a preferred implementation mode, the longitudinal section of the groove in the embodiment is arc-shaped, and by adopting the structure, the area of the clamping plate can be increased, so that the installation efficiency is improved.
As a preferred embodiment, the fiber filter material 4 in this embodiment includes a plurality of graphene fiber strips, each graphene carbon fiber strip includes a connection rope and a graphene carbon fiber, the graphene carbon fiber is fixed on the connection rope, and the graphene carbon fiber is perpendicular to the connection rope.
In a preferred embodiment, the connecting rope in this embodiment includes an aluminum core material and a corrosion-resistant plastic layer coated on the surface of the aluminum core material, and with this structure, the graphene carbon fibers can be stably fixed to the connecting rope, and the aluminum core material can be effectively protected from water corrosion.
As a preferred embodiment, the connecting rod 3 and the inner cylinder 2 in this embodiment are integrated, and the connecting rod 3 and the outer cylinder 1 are connected through a nut, so that the inner cylinder 2 and the outer cylinder 1 are high in production efficiency and simple in production process.
As a preferred embodiment, open on the outer barrel 1 in this embodiment and have a plurality of connecting rod 3 fixed orificess, the tip of connecting rod 3 has one section screw thread section, after outer barrel 1 and interior barrel 2 cover were established, the compensation threaded rod is connected with connecting rod 3, the connecting hole is stretched out at the top of compensation threaded rod, thereby realize being connected between outer barrel 1 and the interior barrel 2, adopt this structure, the installation between outer barrel 1 and the interior barrel 2 is dismantled efficiently, the setting of compensation threaded rod, make the cover that outer barrel 1 can be stable establish on interior barrel 2, can not take place to drop.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A composite biological filter material for a biological aerated filter is characterized in that: the fiber filter material is fixed in the inner through hole and penetrates through the outer barrel body through the outer through hole, vermiculite and ceramsite are arranged in the inner barrel body, two ends of the inner barrel body are provided with baffle plates, and a plurality of water inlet holes or water outlet holes are respectively formed in the two baffle plates;
the connecting rod and the inner cylinder body are of an integral structure, and the connecting rod and the outer cylinder body are connected through a compensation threaded rod;
open on the outer barrel and have a plurality of connecting rod fixed orificess, the tip of connecting rod has one section screw thread section, and outer barrel and interior barrel cover are established the back, and the compensation threaded rod is connected with the connecting rod, and the connecting hole is stretched out at the top of compensation threaded rod to realize being connected between outer barrel and the interior barrel.
2. A composite biological filter material for a biological aerated filter according to claim 1, wherein: the fiber filter material is connected with the inner through hole through a connecting plate, the fiber filter material is connected with the connecting plate through an elastic connecting ring, and the connecting plate is connected with the inner through hole through threads.
3. A composite biological filter material for a biological aerated filter according to claim 1, wherein: a rotating mechanism is arranged on one surface of the connecting plate, which is close to the outer cylinder body.
4. A composite biological filter material for a biological aerated filter according to claim 3, wherein: the rotary mechanism is a clamping plate, the clamping plate and the connecting plate are of an integrated structure, a groove is formed in the connecting plate, and the height of the clamping plate is consistent with the depth of the groove.
5. A composite biological filter material for a biological aerated filter according to claim 4, wherein the composite biological filter material comprises: the longitudinal section of the groove is arc-shaped.
6. A composite biological filter material for a biological aerated filter according to claim 1, wherein: the fiber filter material comprises a plurality of graphene carbon fiber strips, the graphene carbon fiber strips comprise connecting ropes and graphene carbon fibers, the graphene carbon fibers are fixed on the connecting ropes, and the graphene carbon fibers are perpendicular to the connecting ropes.
7. A composite biological filter material for a biological aerated filter according to claim 1, wherein: the connecting rope comprises an aluminum core material and a corrosion-resistant plastic layer coated on the surface of the aluminum core material.
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| CN201911393601.2A CN111072136B (en) | 2019-12-30 | 2019-12-30 | Composite biological filter material for biological aerated filter |
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| CN201911393601.2A CN111072136B (en) | 2019-12-30 | 2019-12-30 | Composite biological filter material for biological aerated filter |
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| CN111072136A CN111072136A (en) | 2020-04-28 |
| CN111072136B true CN111072136B (en) | 2022-04-01 |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2213156Y (en) * | 1994-09-19 | 1995-11-22 | 上海石化环球环保技术工程公司 | Ball type combined filler |
| JP2001232123A (en) * | 2000-02-21 | 2001-08-28 | Matsushita Electric Works Ltd | Filter material and cleaning device using the same |
| JP2003225688A (en) * | 2002-02-05 | 2003-08-12 | Toray Eng Co Ltd | Water purifying material and water purifying method |
| CN1515342A (en) * | 2003-01-05 | 2004-07-28 | 深圳市清泉水系统工程设备有限公司 | Heterogravity composition filtering material |
| CN1579596A (en) * | 2004-05-18 | 2005-02-16 | 清华大学 | Fiber shaped body filtering material |
| CN102126793A (en) * | 2011-03-11 | 2011-07-20 | 扬州大学 | Composite lightweight concrete ecological floating island |
| CN103058362A (en) * | 2013-01-08 | 2013-04-24 | 中国环境科学研究院 | Suspension filler for water treatment |
| CN202988826U (en) * | 2012-11-13 | 2013-06-12 | 浙江省海洋开发研究院 | Ball-cage-shaped suspended filler |
| CN203976477U (en) * | 2014-03-25 | 2014-12-03 | 徐州工程学院 | A kind of two-stage biofilter taking bamboo silk, haydite as filtrate respectively |
| CN104528954A (en) * | 2015-01-22 | 2015-04-22 | 叶澄 | Preparation method of degradable composite biological filler |
| CN106219736A (en) * | 2016-07-26 | 2016-12-14 | 福建省闽东水产研究所 | Complex biological filtrate for BAF |
| CN106430543A (en) * | 2016-11-21 | 2017-02-22 | 安徽清普环保装备有限公司 | Multistage fiber filler device for biological aerated filter |
| CN107140729A (en) * | 2017-05-05 | 2017-09-08 | 广汉海天洁诚水务有限公司 | A kind of reusing sewage pretreated filler |
| CN107311292A (en) * | 2016-04-26 | 2017-11-03 | 成都安捷宜康环保科技有限公司 | Suspension ball filler for sewage disposal |
| CN107720978A (en) * | 2017-10-19 | 2018-02-23 | 浙江大学 | The water treatment filler that waste water synchronously removes ammonia nitrogen and total nitrogen can be achieved |
| CN209685413U (en) * | 2019-03-26 | 2019-11-26 | 南京林业大学 | A kind of ecological floating island purifier |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002078487A (en) * | 2000-09-05 | 2002-03-19 | Zokei:Kk | Microorganism-proliferative bed based on carbonaceous material |
| CN102905778B (en) * | 2010-03-04 | 2016-01-27 | 积水化学工业株式会社 | Polymer membrane for water treatment and manufacture method thereof and method for treating water |
| CN102849845A (en) * | 2012-08-27 | 2013-01-02 | 北京化工大学 | Preparation method and application of biological carbon fiber water treatment filler |
| CN104229996B (en) * | 2014-07-18 | 2016-02-24 | 中国水利水电科学研究院 | A kind of pleuston ecological response device |
| CN204874004U (en) * | 2015-06-23 | 2015-12-16 | 深圳市环境科学研究院 | Built -in combined packing hangs membrane module |
| CN106045010A (en) * | 2016-07-29 | 2016-10-26 | 江苏融汇环境工程有限公司 | Speed separation ball filter material |
| CN107215960B (en) * | 2017-07-29 | 2020-08-14 | 王灵伟 | Biofilm formation combined filler with function of slowing down aging and falling of biofilm |
| CN207659175U (en) * | 2017-09-28 | 2018-07-27 | 中科院建筑设计研究院有限公司 | A kind of spherical suspending filling material |
| CN207552140U (en) * | 2018-01-16 | 2018-06-29 | 湖北楚春归环保科技工程有限公司 | A kind of unpowered Buried Domestic Sewage Treatment Facility |
-
2019
- 2019-12-30 CN CN201911393601.2A patent/CN111072136B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2213156Y (en) * | 1994-09-19 | 1995-11-22 | 上海石化环球环保技术工程公司 | Ball type combined filler |
| JP2001232123A (en) * | 2000-02-21 | 2001-08-28 | Matsushita Electric Works Ltd | Filter material and cleaning device using the same |
| JP2003225688A (en) * | 2002-02-05 | 2003-08-12 | Toray Eng Co Ltd | Water purifying material and water purifying method |
| CN1515342A (en) * | 2003-01-05 | 2004-07-28 | 深圳市清泉水系统工程设备有限公司 | Heterogravity composition filtering material |
| CN1579596A (en) * | 2004-05-18 | 2005-02-16 | 清华大学 | Fiber shaped body filtering material |
| CN102126793A (en) * | 2011-03-11 | 2011-07-20 | 扬州大学 | Composite lightweight concrete ecological floating island |
| CN202988826U (en) * | 2012-11-13 | 2013-06-12 | 浙江省海洋开发研究院 | Ball-cage-shaped suspended filler |
| CN103058362A (en) * | 2013-01-08 | 2013-04-24 | 中国环境科学研究院 | Suspension filler for water treatment |
| CN203976477U (en) * | 2014-03-25 | 2014-12-03 | 徐州工程学院 | A kind of two-stage biofilter taking bamboo silk, haydite as filtrate respectively |
| CN104528954A (en) * | 2015-01-22 | 2015-04-22 | 叶澄 | Preparation method of degradable composite biological filler |
| CN107311292A (en) * | 2016-04-26 | 2017-11-03 | 成都安捷宜康环保科技有限公司 | Suspension ball filler for sewage disposal |
| CN106219736A (en) * | 2016-07-26 | 2016-12-14 | 福建省闽东水产研究所 | Complex biological filtrate for BAF |
| CN106430543A (en) * | 2016-11-21 | 2017-02-22 | 安徽清普环保装备有限公司 | Multistage fiber filler device for biological aerated filter |
| CN107140729A (en) * | 2017-05-05 | 2017-09-08 | 广汉海天洁诚水务有限公司 | A kind of reusing sewage pretreated filler |
| CN107720978A (en) * | 2017-10-19 | 2018-02-23 | 浙江大学 | The water treatment filler that waste water synchronously removes ammonia nitrogen and total nitrogen can be achieved |
| CN209685413U (en) * | 2019-03-26 | 2019-11-26 | 南京林业大学 | A kind of ecological floating island purifier |
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| CN111072136A (en) | 2020-04-28 |
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