CN106745548B - COD (chemical oxygen demand) reducing device - Google Patents
COD (chemical oxygen demand) reducing device Download PDFInfo
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- CN106745548B CN106745548B CN201611240642.4A CN201611240642A CN106745548B CN 106745548 B CN106745548 B CN 106745548B CN 201611240642 A CN201611240642 A CN 201611240642A CN 106745548 B CN106745548 B CN 106745548B
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
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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
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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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
Abstract
The invention provides a COD (chemical oxygen demand) reducing device which comprises an electrolytic bath, wherein a water inlet flange, a water outlet flange, a sewage discharge flange, an aeration connector, an air stripping connector and a junction box are arranged on the periphery of the electrolytic bath, and an electrode plate, a water distribution pipe, an aeration pipe, an air stripping pipe branch pipe, a central pipe and a water collection box assembly are arranged in the electrolytic bath; the cooperation of gas stripping pipe and center tube can make the filler carry out orderly cyclic motion, prevents that the filler from hardening, and has strengthened waste water treatment efficiency.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a COD (chemical oxygen demand) reducing device.
Background
The basic principle of electrochemical technology is to make the pollutant take direct electrochemical reaction on the electrode or make the pollutant take redox conversion by using the strong oxidizing active species generated on the surface of the electrode. The mechanism of electrocatalytic oxidation is mainly the generation of hydroxyl radicals (. OH), superoxide radicals (. O) by the action of the electrode and catalytic material 2 ）、H 2 O 2 To oxidize organic matters in the water body. However, there are many mechanisms for electrocatalytic oxidation treatment of organic matter, and among them, the theory that metal oxides adsorb hydroxyl radicals and metal peroxides is accepted by most researchers.
The invention provides a large amount of devices for reducing the COD value of sewage by an electrochemical method in the market, which have the problems of serious loss of catalytic filler and easy hardening in the using process except high price.
Disclosure of Invention
The invention provides the COD reducing device for solving the problems of the products in the background technology, and the device is convenient to use, easy to control the cost and has a prominent large-scale application prospect.
In order to solve the technical problems, the invention adopts the technical scheme that: a COD reducing device comprises an electrolytic bath, wherein a water inlet flange, a water outlet flange, a sewage discharge flange, an aeration connector, an air stripping connector and a junction box are arranged on the periphery of the electrolytic bath, and an electrode plate, a water distribution pipe, an aeration pipe, an air stripping pipe branch pipe, a central pipe and a water collecting box assembly are arranged in the electrolytic bath;
the water distribution pipe is connected with the water inlet flange, water outlet holes are formed in the water distribution pipe, the aeration joint is externally connected with the air pump and internally connected with the aeration pipe, aeration holes are formed in the aeration pipe, the air stripping joint is externally connected with the air pump and internally connected with the air stripping pipe, the air stripping pipe is communicated with the air stripping branch pipes, the air stripping branch pipes are in one-to-one correspondence with the central pipes, and the free end parts of the air stripping branch pipes extend into the lower parts of the central pipes;
the water collecting tank assembly comprises a water collecting hopper, a flow dividing cylinder, a guide cylinder and a water collecting hopper bracket; the water collecting hopper is fixedly arranged at the upper part in the electrolytic bath by the water collecting hopper bracket and is connected with the water outlet flange through a pipeline, and the upper surface of the water collecting hopper is lower than that of the electrolytic bath; the water collecting hopper comprises a water collecting hopper body and an installation body which are connected in an integrated structure, and the installation body is arranged downwards and communicated with the interior of the water collecting hopper; a central tube fixing ring is arranged at the central position of the lower part in the mounting body and is connected with the mounting body through a plurality of connecting rods; the central pipe is suspended in the electrolytic tank, and the upper part of the central pipe is fixed by the central pipe fixing ring; the draft tube set firmly in the reposition of redundant personnel section of thick bamboo, the reposition of redundant personnel section of thick bamboo set firmly in the installation is internal, be equipped with the shunt tubes on the reposition of redundant personnel section of thick bamboo.
Furthermore, a funnel is arranged below the central tube fixing ring.
Furthermore, the water collecting hopper support comprises at least one hanging plate and at least one fixing plate, the hanging plate and the fixing plate are perpendicular to each other, two ends of the hanging plate are fixedly arranged on two side walls of the electrolytic bath, and the free end portion of the fixing plate is fixedly connected with the inner wall of the water collecting hopper.
Further, the center tube with the fixed mode between the center tube retaining ring is the bolt butt, be equipped with the screw hole that one side was opened, the center tube inserts behind the center tube retaining ring to suitable position, pass by the bolt the screw hole and the top is tight the center tube is peripheral.
Furthermore, two cathode plates and an anode plate are arranged in the electrolytic cell, the two electrode plates are respectively and fixedly arranged in the clamping grooves on the two side walls in the electrolytic cell, and the anode plate is fixedly arranged in the clamping groove in the middle of the electrolytic cell.
Furthermore, the water outlet is provided with a downward opening.
Further, the aeration holes are arranged with openings downward.
Further, the lower part of the electrolytic cell is also provided with a base.
The invention has the advantages and positive effects that:
(1) The matching of the gas stripping pipe and the central pipe can lead the filler to carry out ordered circular motion, prevent the filler from hardening and enhance the wastewater treatment efficiency;
(2) The device needs aeration and gas stripping when in operation, the catalytic filler flows out along with the aeration or gas stripping to cause loss, and the guide cylinder has the function of preventing the filler from overflowing to avoid filler loss;
(3) Generating hydroxyl radical (. OH), superoxide radical (. O) by cooperation of electrode and catalytic material 2 ）、H 2 O 2 Organic pollutants are often directly oxidized and decomposed into small-molecule organic fragments or mineralized into CO 2 And H 2 When the technology is used for treating organic wastewater, the technology has the advantages of broad spectrum, high efficiency, rapidness, stability, mild treatment conditions, suitability for high and low concentrations, small occupied area, extremely small sludge amount, no secondary pollution, deodorization, sterilization and other functions, is a clean new water treatment technology, and has huge potential and very wide application prospect.
Drawings
FIGS. 1 and 2 are schematic views of the internal structure of the present invention in different orientations;
FIG. 3 is a schematic diagram of the external structure of the invention;
fig. 4, 5 and 6 are schematic structural views of different orientations of the water collecting tank assembly in the invention;
FIG. 7 is a schematic diagram of the circulation path of the packing in the inventive apparatus.
In the figure: 1. the electrolytic tank comprises an electrolytic tank body, 2, a water inlet flange, 3, a water outlet flange, 4, a sewage discharge flange, 5, an aeration joint, 6, an air lifting joint, 7, a junction box, 8, an electrode plate, 9, a water distribution pipe, 10, an aeration pipe, 11, an air lifting pipe, 12, an air lifting branch pipe, 13, a central pipe, 14, a water collecting hopper, 141, a water collecting hopper body, 142, an installation body, 143, a central pipe fixing ring, 144, a connecting rod, 145, a funnel, 15, a shunt cylinder, 151, a shunt pipe, 16, a guide cylinder, 17, a hanging plate, 18, a fixing plate, 19, a clamping groove, 20 and a base.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
A COD reducing device is a glass steel device, the glass steel material has high hardness and acid and alkali corrosion resistance, and is the best material for manufacturing a water treatment device; the device is 1760mm long, 910mm wide, does not contain the high 2050mm of base, and the high 400mm of base, and base 20 passes through connecting bolt and device body installation together, plays the fixed action.
The device comprises an electrolytic tank 1, wherein a water inlet flange 2, a water outlet flange 3, a sewage discharge flange 4, an aeration joint 5, an air lifting joint 6 and a junction box 7 are arranged on the periphery of the electrolytic tank 1, and an electrode plate 8, a water distribution pipe 9, an aeration pipe 10, an air lifting pipe 11, an air lifting branch pipe 12, a central pipe 13, a water collecting hopper 14, a flow dividing cylinder 15, a flow guide cylinder 16, a hanging plate 17 and a fixing plate 18 are arranged in the electrolytic tank 1;
the water distribution pipe 9 is connected with the water inlet flange 2, and the water inlet flange is positioned at the lower part of the device to ensure that the wastewater enters from the lower part and goes out from the upper part, promote the flow of the wastewater and the filler in the device and enhance the treatment efficiency; the water distribution pipe 9 is provided with water outlet holes which are arranged downwards, the aeration joint 5 is externally connected with an air pump and internally connected with the aeration pipe 10, the aeration pipe 10 is provided with aeration holes which are arranged downwards, the air-lifting joint 6 is externally connected with an air pump and internally connected with the air-lifting pipe 11, the air-lifting pipe 11 is communicated with the air-lifting branch pipes, the two air-lifting branch pipes are in one-to-one correspondence with the two central pipes 13, and the free end parts of the air-lifting branch pipes extend into the lower parts of the central pipes 13;
the water collecting hopper 14 is fixedly arranged at the upper part in the electrolytic bath 1 by the bracket of the water collecting hopper 14 and is connected with the water outlet flange 3 through a pipeline, and the upper surface of the water collecting hopper 14 is lower than that of the electrolytic bath 1; the water collecting hopper 14 comprises a water collecting hopper body 141 and two mounting bodies 142 which are connected in an integrated structure, wherein the mounting bodies 142 are arranged downwards and communicated with the inside of the water collecting hopper 14; a central tube fixing ring 143 is arranged at the center of the lower part in the mounting body 142, the central tube fixing ring 143 is connected with the mounting body 142 through a plurality of connecting rods 144, and a funnel 145 is arranged below the central tube fixing ring 143; the two central pipes 13 are suspended in the electrolytic tank 1, and the upper parts of the central pipes are fixed by the central pipe fixing ring 143; the draft tube 16 is bonded in the shunt tube 15, the shunt tube 15 is bonded in the mounting body 142, and the shunt tube 151 is arranged on the shunt tube 15.
The two hanging plates 17 are fixedly arranged on two side walls of the electrolytic bath 1, each hanging plate 17 is provided with two fixing plates 18 which are arranged downwards, and free end parts of the two fixing plates 18 are adhered to two inner side walls of the water collecting hopper 14.
In the embodiment, the distance between the centers of the two central pipes 13 is 830mm, the lower end parts of the central pipes 13 penetrate through the central pipe fixing rings 143 and then are directly inserted into the packing in the electrolytic cell 1, the air stripping pipes 11 are ventilated, the air stripping branch pipes 12 are upwards stripped in the central pipes 13, the air stripping pipes and the air stripping branch pipes are all snakeskin pipes, the packing in the central pipes 13 can be blown out, then the packing below the air stripping pipes can be supplemented into the central pipes 13, the blown-out packing can return to the bottom of the device through the guide cylinders 16 and the water collecting hoppers 14, and thus the ordered circulating motion of the packing is formed, the packing is prevented from being hardened, and the wastewater treatment efficiency is enhanced; the funnel 145 arranged at the lower part of the water collecting hopper 14 has a dispersing effect on the filler flowing out of the guide cylinder 16, so that the excessive accumulation of the filler around the central pipe 13 is avoided;
wherein, the draft tube 16 is used for preventing the filler from overflowing and avoiding the loss of the filler, the air stripping is used for preventing the filler from being hardened, in the air stripping process, the filler is stripped to the upper part of the device from the bottom end of the device, and a part of wastewater still exists, and the wastewater enters the water collecting hopper 14 through the draft tube 15 and the shunt tube 151 in sequence and enters the next stage through the water outlet flange. In the wastewater treatment process, the generated sludge is discharged through a sewage discharge flange 4 at the bottom end of the device.
The device is characterized in that the guide shell 16 is bonded in the flow distributing shell 15, the flow distributing shell 15 is bonded in the water collecting hopper 14, the water collecting hopper 14 is fixedly bonded with the device through the hanging plates 17 and the fixing plate 18, the distance between the two hanging plates 17 is 640mm, and the bonding fixing mode is simple and reliable and is convenient to clean and maintain.
The left side and the right side of the device are provided with negative electrode assemblies, the middle part is provided with a positive electrode assembly, and the positive electrode plate and the negative electrode plate are limited and fixed by a clamping groove 19; in addition, graphite plates are more costly than stainless steel plates, and can be used as the negative electrode, and the positive electrode, which attracts negative charges and negatively charged ions, such as Cl, without affecting the processing results - ，SO 4 2- And the ions can not corrode the graphite electrode plate, and if the stainless steel plate is used as the anode, the ions can be corroded quickly, so that the experimental effect can be influenced, and the cost can be increased.
The reaction principle of the device is that activated carbon filler is added into the device, the graphite plate and the stainless steel plate are well installed, direct current is switched on, output voltage is 48V, aeration is carried out, oxygen in air is utilized, hydroxyl free radicals (. OH) with extremely strong oxidizability are generated in the reaction device, and the hydroxyl free radicals can rapidly oxidize polycyclic or heterocyclic aromatic hydrocarbons to be degraded into micromolecular organic matters which are easily further decomposed by microorganisms, and even are thoroughly mineralized into carbon dioxide and water by the hydroxyl free radicals.
Table 1 shows the comparative experimental results of a plurality of chemical wastewater samples after being pretreated and treated for 30min by using the apparatus of the present invention and the existing apparatus (the existing apparatus is not provided with the stripping pipe 11, the stripping branch pipe, the central pipe 13, the water collecting hopper 14, the draft tube 16 and the flow dividing tube 15):
TABLE 1
Can find out through above-mentioned experiment, the COD of this device and the effect of getting rid of ammonia nitrogen are obvious, are used in five kinds of different waste water samples, all have than good effect.
The device has the advantages of small occupied area, low voltage ratio, low power consumption and low operation cost. Meanwhile, the device has lower requirements on the environment, can be used at normal temperature and normal pressure, has stable treatment effect, extremely small sludge amount and no secondary pollution.
The above description is for the purpose of describing particular embodiments of the present invention, but the present invention is not limited to the particular embodiments described herein. All equivalent changes and modifications made within the scope of the invention shall fall within the scope of the invention.
Claims (6)
1. A COD reducing device is characterized by comprising an electrolytic bath, wherein a water inlet flange, a water outlet flange, a sewage discharge flange, an aeration connector, an air stripping connector and a junction box are arranged on the periphery of the electrolytic bath, and an electrode plate, a water distribution pipe, an aeration pipe, an air stripping pipe branch pipe, a central pipe and a water collection box assembly are arranged in the electrolytic bath;
the water distribution pipe is connected with the water inlet flange, a water outlet hole is formed in the water distribution pipe, the aeration connector is externally connected with the air pump and internally connected with the aeration pipe, aeration holes are formed in the aeration pipe, the air stripping connector is externally connected with the air pump and internally connected with the air stripping pipe, the air stripping pipe is communicated with the air stripping branch pipes, the air stripping branch pipes are in one-to-one correspondence with the central pipes, and the free end parts of the air stripping branch pipes extend into the lower parts of the central pipes;
the water collecting tank assembly comprises a water collecting hopper, a flow distributing cylinder, a flow guide cylinder and a water collecting hopper support; the water collecting hopper is fixedly arranged at the upper part in the electrolytic bath by the water collecting hopper bracket and is connected with the water outlet flange through a pipeline, and the upper surface of the water collecting hopper is lower than that of the electrolytic bath; the water collecting hopper comprises a water collecting hopper body and an installation body which are connected in an integrated structure, and the installation body is arranged downwards and communicated with the interior of the water collecting hopper; a central tube fixing ring is arranged at the central position of the lower part in the mounting body and is connected with the mounting body through a plurality of connecting rods; the central pipe is suspended in the electrolytic tank, and the upper part of the central pipe is fixed by the central pipe fixing ring; the guide cylinder is fixedly arranged in the shunt cylinder, the shunt cylinder is fixedly arranged in the mounting body, and the shunt tube is arranged on the shunt cylinder;
a funnel is arranged below the central tube fixing ring;
the water collecting hopper support comprises at least one hanging plate and at least one fixing plate, the hanging plate and the fixing plate are perpendicular to each other, two ends of the hanging plate are fixedly arranged on two side walls of the electrolytic bath, and the free end portion of the fixing plate is fixedly connected with the inner wall of the water collecting hopper.
2. The COD reducing device according to claim 1, wherein the central tube is fixed to the central tube fixing ring by means of bolt abutting, a threaded hole with one side opened is formed in the central tube, and after the central tube is inserted into the central tube fixing ring to a proper position, a bolt penetrates through the threaded hole and abuts against the periphery of the central tube.
3. The COD reducing device according to claim 1, wherein two cathode plates and one anode plate are arranged in the electrolytic cell, the two electrode plates are respectively fixedly arranged in the clamping grooves on the two side walls in the electrolytic cell, and the anode plate is fixedly arranged in the clamping groove in the middle part in the electrolytic cell.
4. The COD reducing device according to claim 1, wherein said water outlet holes are arranged with their openings facing downwards.
5. The COD-reducing apparatus according to claim 1, wherein the aeration holes are open downward.
6. The COD reducing apparatus according to claim 1, wherein a base is further provided at the lower part of the electrolytic cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240642.4A CN106745548B (en) | 2016-12-29 | 2016-12-29 | COD (chemical oxygen demand) reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611240642.4A CN106745548B (en) | 2016-12-29 | 2016-12-29 | COD (chemical oxygen demand) reducing device |
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| Publication Number | Publication Date |
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| CN106745548A CN106745548A (en) | 2017-05-31 |
| CN106745548B true CN106745548B (en) | 2022-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611240642.4A Active CN106745548B (en) | 2016-12-29 | 2016-12-29 | COD (chemical oxygen demand) reducing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110104764A (en) * | 2019-05-23 | 2019-08-09 | 陆鑫 | A kind of organic wastewater purifying processing equipment and its treatment process |
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| CN206318754U (en) * | 2016-12-29 | 2017-07-11 | 中新环科（天津）科技有限公司 | A kind of new drop COD equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2573471C2 (en) * | 2009-09-18 | 2016-01-20 | Херайзн Ойлфилд Сольюшнс Инк. | Plant and method of concentration of pollutants in waste water |
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2016
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|---|---|---|---|---|
| CN203060961U (en) * | 2013-02-26 | 2013-07-17 | 成都源创环保工程有限公司 | Combined continuous filtering device of flowing sand |
| CN203451286U (en) * | 2013-09-02 | 2014-02-26 | 遵义天力环境工程有限责任公司 | Two-phase double-circulation anaerobic expanded bed bioreactor |
| CN103910414A (en) * | 2014-04-23 | 2014-07-09 | 中国核工业华兴建设有限公司 | Combined electrolysis reactor and waste water treatment method thereof |
| CN105152307A (en) * | 2015-07-24 | 2015-12-16 | 中电环保股份有限公司 | Removal device for organic matters of wastewater |
| CN205472817U (en) * | 2015-12-31 | 2016-08-17 | 中新环科（天津）科技有限公司 | COD equipment falls in electricity catalytic oxidation |
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