CN215480278U - Hardly degradable organic waste water treatment equipment - Google Patents
Hardly degradable organic waste water treatment equipment Download PDFInfo
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- CN215480278U CN215480278U CN202121230312.3U CN202121230312U CN215480278U CN 215480278 U CN215480278 U CN 215480278U CN 202121230312 U CN202121230312 U CN 202121230312U CN 215480278 U CN215480278 U CN 215480278U
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Abstract
The utility model discloses a treatment device for refractory organic wastewater, which comprises a pretreatment unit, an electrocatalytic oxidation unit, a deep oxidation unit and a solid-liquid separation unit which are sequentially connected in series; the pretreatment unit is an organic wastewater inlet end of equipment, a water inlet end of the electrocatalytic oxidation unit is in butt joint with a water outlet end of the pretreatment unit, an oxidation electrode is arranged in the electrocatalytic oxidation unit, a water inlet end of the deep oxidation unit is in butt joint with a water outlet end of the electrocatalytic oxidation unit, a water inlet end of the solid-liquid separation unit is connected with a water outlet end of the deep oxidation unit, and a water outlet end of the solid-liquid separation unit is a wastewater discharge end of the equipment; and adjacent units are connected through a self-flowing pipeline or a pumping pipeline. The utility model has the advantages of compact process, shortened treatment time of water treatment, simple structure, low treatment cost, small by-product and wide application range, and is particularly suitable for efficiently removing COD (chemical oxygen demand) of high-salt high-COD refractory organic wastewater.
Description
Technical Field
The utility model belongs to the technical field of environmental protection, and particularly relates to a treatment device for organic wastewater difficult to degrade.
Background
With the continuous development of the chemical industry, a large amount of waste water of petrifaction, medicines, pesticides and dyes is discharged into the environment, which causes irreversible harm to water, especially a series of waste water which has various organic pollutants, complex structure, toxicity, harm and the like and can not be degraded by a biological method, which is always a key point and a difficult point in the field of waste water treatment.
At present, the removal method of COD in organic wastewater mainly comprises three major methods, namely a physical method, an advanced oxidation method and a biochemical method. The physical method adopts the means of coagulating sedimentation, activated carbon adsorption and the like to carry out coagulating adsorption and complementary collection on organic matters in the wastewater in the organic wastewater and then filter, so that the removal efficiency is not high, and the effect on the organic matters which are difficult to degrade in the wastewater is not good; the advanced oxidation method comprises ozone oxidation, Fenton oxidation, electrooxidation and the like, the traditional Fenton method has high treatment cost, and a large amount of iron-containing sludge can be generated in the degradation process of organic matters to cause secondary pollution; the electrooxidation method has high power consumption, the selection of electrodes is also important, and auxiliary treatment equipment is needed to be designed, the device of a water treatment system is complex, and the cost of treatment equipment is further increased.
Therefore, development of a treatment device which can remove COD in the organic wastewater difficult to degrade with high efficiency, simple process and low cost is urgently needed.
Disclosure of Invention
The technical problem solved by the utility model is as follows: aiming at the problems of long process and complex structure of the prior COD removing device in the organic wastewater, which lead to high treatment cost, a novel device for treating the organic wastewater difficult to degrade is provided.
The utility model is realized by adopting the following technical scheme:
a treatment device for refractory organic wastewater comprises a pretreatment unit, an electrocatalytic oxidation unit, a deep oxidation unit and a solid-liquid separation unit which are sequentially connected in series; wherein the content of the first and second substances,
the pretreatment unit is an organic wastewater access end of the device and is used for adjusting the pH value of the organic wastewater and removing impurities in the organic wastewater;
the water inlet end of the electrocatalytic oxidation unit is in butt joint with the water outlet end of the pretreatment unit, an oxidation electrode is arranged in the electrocatalytic oxidation unit, and preliminary electrocatalytic oxidation is carried out on the pretreated organic wastewater;
the water inlet end of the deep oxidation unit is butted with the water outlet end of the electrocatalytic oxidation unit and is used for adding an oxidant to further oxidize the organic wastewater subjected to preliminary electrocatalytic oxidation;
the water inlet end of the solid-liquid separation unit is connected with the water outlet end of the deep oxidation unit, and is used for carrying out solid-liquid separation on the oxidized organic wastewater precipitate, and the water outlet end of the solid-liquid separation unit is the wastewater discharge end of the equipment;
and adjacent units are connected through a self-flowing pipeline or a pumping pipeline.
Specifically, in the treatment equipment for the organic wastewater difficult to degrade, the pretreatment unit is a pretreatment tank, a wastewater inlet and a wastewater outlet and a material adding port are formed in a tank body of the pretreatment tank, and a pH meter for detecting the pH value of the organic wastewater is arranged in the pretreatment tank.
In the pretreatment unit of above-mentioned scheme, it is further, the inside stirring subassembly that still is equipped with of pretreatment tank, the stirring subassembly includes driving motor, (mixing) shaft and stirring vane, stirring motor installs at the pretreatment tank crown portion, inside the (mixing) shaft was connected with the driving motor transmission and stretched into the pretreatment tank downwards, stirring vane fixed mounting was at the free rotation end of (mixing) shaft.
In the treatment equipment for the refractory organic wastewater, the oxidation electrode arranged in the electrocatalytic oxidation unit adopts a special electrode, and comprises a BDD electrode, a titanium ruthenium iridium electrode, a three-dimensional electrode and Ti/SnO2Electrodes or Ti/PbO2And an electrode.
In the treatment equipment for the organic wastewater difficult to degrade, the deep oxidation unit is an oxidation tank, and a wastewater inlet and a wastewater outlet and an oxidant adding port are formed in a tank body of the deep oxidation unit.
In the deep oxidation unit of the above scheme, further, the oxidant adopted in the deep oxidation unit includes at least one of sodium hypochlorite, hypochlorous acid, chlorine, hydrogen peroxide, persulfuric acid and potassium ferrate.
Specifically, in the treatment equipment for the refractory organic wastewater, the solid-liquid separation unit comprises a first-stage filter press, a slurry washing tank and a second-stage filter press, a feed inlet of the slurry washing tank is in butt joint with a filter residue outlet of the first-stage filter press, a discharge outlet of the slurry washing tank is in butt joint with a feed inlet of the second-stage filter press, and a filtrate outlet of the first-stage filter press and a filtrate outlet of the second-stage filter press are in tandem connection to form a water outlet end of the solid-liquid separation unit.
In the solid-liquid separation unit of the above scheme, further, a filter residue conveying pump is arranged on a pipeline between the slurry cleaning tank and the second-stage filter press.
In the treatment equipment for the organic wastewater difficult to degrade, the pumping pipeline connecting the two units is a connecting pipeline provided with a centrifugal pump.
The process route for treating the refractory organic wastewater by the scheme of the utility model adopts pretreatment, preliminary electrocatalytic oxidation, further oxidant catalytic oxidation and solid-liquid separation, wherein the pretreatment unit pretreats the organic wastewater, adjusts the pH value of the wastewater to meet the requirements of subsequent process steps, and can also aerate the wastewater to increase the oxygen content of the wastewater; the electrocatalytic oxidation unit carries out preliminary electrocatalytic oxidation on pretreated wastewater, the deep oxidation unit further completely oxidizes the wastewater, different types of oxidation electrodes can be replaced to adapt to different types of organic wastewater, the degree of electrocatalytic oxidation between organic matters and metal ions in the wastewater can be adjusted by adjusting the current, voltage and residence time of the oxidation electrodes in the electrocatalytic oxidation unit, a stable complex is formed, then the deep oxidation unit is combined to completely oxidize the residual organic matters after the electrocatalytic oxidation, and finally the organic wastewater after oxidation is filtered and removed through the solid-liquid separation unit, so that the organic matters and the heavy metal ions in the wastewater are effectively removed.
The method combines electrocatalytic oxidation and oxidant oxidation, can save the time of oxidation reaction and the energy consumption of electrocatalytic oxidation compared with a scheme of completely oxidizing treatment by singly adopting electrocatalytic oxidation, and can reduce the consumption of the oxidant and the treatment cost of byproducts compared with a scheme of singly adopting oxidant oxidation.
In conclusion, compared with the organic wastewater treatment scheme in the prior art, the device has the advantages of compact process, shortened treatment time of water treatment, simple structure, low treatment cost, small by-products, wide application range and particular suitability for efficiently removing COD (chemical oxygen demand) of high-salt high-COD refractory organic wastewater.
Drawings
FIG. 1 is a schematic view of an apparatus for treating refractory organic wastewater according to an embodiment.
FIG. 2 is a schematic composition diagram of a solid-liquid separation unit in the example.
Reference numbers in the figures: 1-pretreatment tank, 2-first centrifugal pump, 3-electrocatalytic oxidation unit, 4-second centrifugal pump, 5-deep oxidation tank, 6-third centrifugal pump, 7-solid-liquid separation unit, 71-first-stage filter press, 72-slurry cleaning tank, 73-second-stage filter press and 74-filter residue conveying pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the treatment equipment for refractory organic wastewater in this embodiment includes a pretreatment tank 1, a first centrifugal pump 2, an electrocatalytic oxidation unit 3, a second centrifugal pump 4, a deep oxidation tank 5, a third centrifugal pump 6, and a solid-liquid separation unit 7. The pretreatment tank 1, the electrocatalytic oxidation unit 3, the deep oxidation tank 5 and the solid-liquid separation unit 7 are sequentially arranged in series, and the series connection and the communication of all the units are realized between the two adjacent units through connecting pipelines provided with centrifugal pumps.
The pretreatment tank 1 is a pretreatment unit of this embodiment, a wastewater inlet and outlet is formed in a tank body of the pretreatment tank, a material adding port is further formed in the tank body of the pretreatment tank, an acid-base solution can be added to adjust the pH value of wastewater according to a process means required for pretreatment, or the oxygen content in the wastewater is increased by aeration, and other pretreatment means are adopted, and a pH meter for detecting the pH value of the organic wastewater is further arranged in the pretreatment tank 1. To the pretreatment process means that needs the stirring, this embodiment still is equipped with the stirring subassembly in pretreatment tank 1 is inside, and the stirring subassembly includes driving motor, (mixing) shaft and stirring vane, and stirring motor installs at pretreatment tank top, and inside the (mixing) shaft was connected and stretched into pretreatment tank downwards with driving motor transmission, stirring vane fixed mounting was at the free rotation end of (mixing) shaft.
The outlet of the pretreatment tank 1 is butt-jointed to the water inlet end of the electrocatalytic oxidation unit 3 through the pumping pipeline of the first centrifugal pump 2, the electrocatalytic oxidation unit 3 comprises a reaction vessel, an oxidation electrode is arranged in the electrocatalytic oxidation unit, and preliminary electrocatalytic oxidation is carried out on organic wastewater which enters the reaction vessel after pretreatment. The oxidation electrode arranged in the electrocatalytic oxidation unit adopts a special electrode and comprises a BDD electrode, a titanium ruthenium iridium electrode, a three-dimensional electrode and Ti/SnO2Electrodes or Ti/PbO2The electrode and the electrocatalytic oxidation unit 3 can adjust parameters such as current, voltage, retention time and the like of the oxidation electrode, and further control the reaction time and reaction intensity of the organic wastewater in the electrocatalytic oxidation unit 3.
The water outlet end of the electrocatalytic oxidation unit 3 is butted to the water inlet end of the deep oxidation tank 5 through the pumping pipeline of the second centrifugal pump 4, the deep oxidation tank 5 is a deep oxidation unit for organic wastewater in the embodiment, a wastewater inlet and a wastewater outlet and an oxidant adding port are arranged on the tank body of the deep oxidation tank 5, the wastewater inlet and the wastewater outlet are used for the inlet and the outlet of wastewater, the oxidant adding port is used for adding an oxidant to the organic wastewater in the tank body, and the residual organic matters which are oxidized in the electrocatalytic oxidation unit are subjected to oxidation treatment, wherein the oxidant adopted in the embodiment comprises at least one of sodium hypochlorite, hypochlorous acid, chlorine, hydrogen peroxide, persulfuric acid and potassium ferrate.
The water outlet of the deep oxidation tank 5 is butted to a solid-liquid separation unit 7 through a pumping pipeline of a third centrifugal pump 6, the solid-liquid separation unit 7 is used for carrying out solid-liquid separation on the oxidized organic wastewater precipitate, and the water outlet end of the solid-liquid separation unit is the wastewater discharge end of the equipment.
Specifically, as shown in fig. 2, the solid-liquid separation unit 7 of the present embodiment includes a first-stage filter press 71, a slurry washing tank 72, and a second-stage filter press 73, wherein a feed inlet of the slurry washing tank 72 is in butt joint with a residue outlet of the first-stage filter press 71, and a residue transfer pump 74 is disposed on a pipeline between the slurry washing tank 72 and the second-stage filter press 73. The discharge hole of the slurry cleaning tank 72 is butted with the feed hole of the second-stage filter press 73, the filtrate outlet of the first-stage filter press 71 and the filtrate outlet of the second-stage filter press 73 are converged to form the water outlet end of the solid-liquid separation unit 7, standard wastewater is discharged, and filter residue is recovered from the discharge hole of the second-stage filter press 73.
In the embodiment, the units can be butted through the gravity flow pipelines, wastewater can be treated from a high unit to a low unit through gravity action according to a process route, and in practical application, one or a combination of the gravity flow pipelines and the pumping pipelines can be selected according to the position layout of each unit.
Referring to fig. 1 again, in this embodiment, the wastewater enters a pretreatment tank 1 for pretreatment, and is discharged into an electrocatalytic oxidation unit 3 through a first centrifugal pump 2 after pretreatment, the electrocatalytic oxidation unit can set current, voltage, residence time and change electrode types, and the liquid after the electrocatalytic oxidation is connected with a deep oxidation tank 5 through a second centrifugal pump 4. The deep oxidation tank 5 is connected with a solid-liquid separation unit 7 through a third centrifugal pump 6 and is used for separating standard-reaching wastewater from filter residues.
The embodiment can efficiently remove COD in the high-salt high-COD refractory organic wastewater; the whole device has simple structure, low treatment cost, small amount of generated slag and wide application range.
The specific technological process for efficiently removing COD in the high-salt high-COD refractory organic wastewater by using the implementation device is as follows:
step 1: high-salt high-COD degradation-resistant organic wastewater enters a pretreatment tank 1, and pretreatment regulation is carried out on the wastewater by pretreatment methods such as acid regulation, alkali regulation, aeration and the like;
step 2: discharging the pretreated wastewater in the pretreatment tank 1 into a reaction vessel of an electrocatalytic oxidation unit 3 through a first centrifugal pump 2, carrying out electrocatalytic oxidation treatment on the wastewater by adopting a special electrode in the electrocatalytic oxidation unit 3, setting current density, operating voltage and retention time, and feeding the wastewater after the electrocatalytic oxidation treatment into a deep oxidation tank 5 through a second centrifugal pump 4;
and step 3: adding a certain amount of oxidant into the deep oxidation tank 5 to further perform deep oxidation reaction with the liquid after electro-oxidation;
and 4, step 4: after deep oxidation, the liquid enters a solid-liquid separation unit 7 for solid-liquid separation, wastewater reaching the standard is directly discharged, and filter residues are subjected to solid waste disposal;
the above examples are merely illustrative for clearly illustrating the present invention and are not intended to limit the embodiments. It will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure, and it is not necessary or necessary to exhaustively enumerate all embodiments herein, and all such obvious variations and modifications are to be considered within the scope of the present invention.
Claims (9)
1. The utility model provides a difficult degradation organic waste water treatment equipment which characterized in that: comprises a pretreatment unit, an electrocatalytic oxidation unit, a deep oxidation unit and a solid-liquid separation unit which are sequentially connected in series; wherein the content of the first and second substances,
the pretreatment unit is an organic wastewater access end of the device and is used for adjusting the pH value of the organic wastewater and removing impurities in the organic wastewater;
the water inlet end of the electrocatalytic oxidation unit is in butt joint with the water outlet end of the pretreatment unit, an oxidation electrode is arranged in the electrocatalytic oxidation unit, and preliminary electrocatalytic oxidation is carried out on the pretreated organic wastewater;
the water inlet end of the deep oxidation unit is butted with the water outlet end of the electrocatalytic oxidation unit and is used for adding an oxidant to further oxidize the organic wastewater subjected to preliminary electrocatalytic oxidation;
the water inlet end of the solid-liquid separation unit is connected with the water outlet end of the deep oxidation unit, and is used for carrying out solid-liquid separation on the oxidized organic wastewater precipitate, and the water outlet end of the solid-liquid separation unit is the wastewater discharge end of the equipment;
and adjacent units are connected through a self-flowing pipeline or a pumping pipeline.
2. The apparatus of claim 1, wherein: the pretreatment unit is a pretreatment tank, a wastewater inlet and outlet and a material adding port are arranged on a tank body of the pretreatment unit, and a pH meter for detecting the pH value of the organic wastewater is arranged in the pretreatment unit.
3. The apparatus of claim 2, wherein: the inside stirring subassembly that still is equipped with of preliminary treatment jar, the stirring subassembly includes driving motor, (mixing) shaft and stirring vane, stirring motor installs at preliminary treatment tank deck portion, inside the (mixing) shaft was connected and stretched into preliminary treatment jar downwards with the driving motor transmission, stirring vane fixed mounting was held at the free rotation of (mixing) shaft.
4. The apparatus for treating refractory organic waste water as claimed in claim 1Is characterized in that: the oxidation electrode arranged in the electrocatalytic oxidation unit adopts a special electrode and comprises a BDD electrode, a titanium ruthenium iridium electrode, a three-dimensional electrode and Ti/SnO2Electrodes or Ti/PbO2And an electrode.
5. The apparatus of claim 1, wherein: the deep oxidation unit is an oxidation tank, and a wastewater inlet and a wastewater outlet and an oxidant adding port are arranged on a tank body of the deep oxidation unit.
6. The apparatus of claim 5, wherein: the oxidant adopted in the deep oxidation unit comprises at least one of sodium hypochlorite, hypochlorous acid, chlorine, hydrogen peroxide, persulfuric acid and potassium ferrate.
7. The apparatus of claim 1, wherein: the solid-liquid separation unit comprises a first-stage filter press, a slurry cleaning tank and a second-stage filter press, wherein a feed inlet of the slurry cleaning tank is in butt joint with a filter residue outlet of the first-stage filter press, a discharge outlet of the slurry cleaning tank is in butt joint with a feed inlet of the second-stage filter press, and a filtrate outlet of the first-stage filter press and a filtrate outlet of the second-stage filter press are in tandem joint to form a water outlet end of the solid-liquid separation unit.
8. The apparatus of claim 7, wherein: and a filter residue conveying pump is arranged on a pipeline between the slurry cleaning tank and the second-stage filter press.
9. A refractory organic wastewater treatment plant as claimed in any one of claims 1 to 8, wherein: the pumping pipeline is a connecting pipeline provided with a centrifugal pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121230312.3U CN215480278U (en) | 2021-06-03 | 2021-06-03 | Hardly degradable organic waste water treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121230312.3U CN215480278U (en) | 2021-06-03 | 2021-06-03 | Hardly degradable organic waste water treatment equipment |
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| CN215480278U true CN215480278U (en) | 2022-01-11 |
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| CN202121230312.3U Active CN215480278U (en) | 2021-06-03 | 2021-06-03 | Hardly degradable organic waste water treatment equipment |
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