CN214735010U - Treatment device for chemical nickel plating wastewater - Google Patents
Treatment device for chemical nickel plating wastewater Download PDFInfo
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- CN214735010U CN214735010U CN202120649667.XU CN202120649667U CN214735010U CN 214735010 U CN214735010 U CN 214735010U CN 202120649667 U CN202120649667 U CN 202120649667U CN 214735010 U CN214735010 U CN 214735010U
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Abstract
The utility model provides a processing apparatus of chemical nickel plating waste water, it includes one-level fenton oxidation reactor, second grade ozone/calcium peroxide oxidation reactor, charge device, ozone generator, one-level fenton oxidation reactor and second grade ozone/calcium peroxide oxidation reactor establish ties, one-level fenton oxidation reactor is equipped with water inlet, delivery port, dosing mouth, mud discharging mouth, tail gas discharge port, second grade ozone/calcium peroxide oxidation reactor is equipped with water inlet, delivery port, medicine charge door, mud discharging mouth, gas outlet, one-level fenton oxidation reactor's delivery port and second grade ozone/calcium peroxide oxidation reactor's water inlet intercommunication, ozone generator's gas outlet and second grade ozone/calcium peroxide oxidation reactor's intercommunication. Adopt the technical scheme of the utility model, carry out the coupling with one-level fenton oxidation reactor and second grade ozone/calcium peroxide oxidation reactor and ally oneself with, have better treatment effect, reduced area, practiced thrift the cost input.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, especially, relate to a processing apparatus of chemical nickel plating waste water.
Background
Chemical nickel plating is a novel surface treatment technology for depositing a compact plating layer on the surface of a material by an autocatalytic chemical reaction in a coexisting solution of a metal nickel salt and a hypophosphite as a strong reducing agent. With the proceeding of the deposition reaction of the nickel-phosphorus alloy coating, the by-products of phosphite, sodium ion, sulfate ion, etc. in the solution system are continuously accumulated, and finally a great amount of chemical nickel plating wastewater containing heavy metal complex is generated. Aiming at the polluted water bodies, the treatment idea of preoxidation and collateral breaking and coagulating sedimentation is mainly adopted at present.
In terms of pre-oxidation and complex breaking, because a single oxidation technology such as fenton, ozone and the like has limitations, the actual treatment process tends to strengthen the oxidation and complex breaking in a technical coupling mode so as to widen the application range of the coupling process and efficiently remove target pollutants. Chinese patent CN110015805A combines ozone and heterogeneous Fenton-like oxidation technology to treat organic wastewater under neutral condition. However, the coupled treatment process also exposes problems, such as: repeatedly adding acid or alkali to adjust the pH value of the solution during coupling; when the gaseous ozone oxidant participates in gas-solid or gas-liquid interface reaction, the gaseous ozone oxidant cannot be completely utilized, and resource waste is easily caused. On the other hand, aiming at the coagulating sedimentation process, the traditional treatment process generally needs to be provided with a separate sedimentation reaction tank and a mechanical stirring device, and the defects of large occupied area, high reagent adding cost and the like exist, so that the actual requirements of small enterprises or low-water-volume wastewater treatment systems cannot be met. Based on this, it is urgently needed to develop a comprehensive treatment device suitable for chemical nickel plating wastewater treatment to realize better treatment of wastewater.
SUMMERY OF THE UTILITY MODEL
To above technical problem, the utility model discloses a processing apparatus of chemical nickel plating waste water through the coupling of one-level fenton oxidation and second grade ozone/calcium peroxide oxidation allies oneself with, realizes high-efficient broken complex of heavy metal complex, Ni2+Effluent reaches the standard and coexists the synchronous reduction of the pollutant, and does not need the separate sedimentation reaction tank, have reduced the floor area, has reduced the cost.
To this end, the utility model discloses a technical scheme do:
the utility model provides a processing apparatus of chemical nickel plating waste water, its includes one-level fenton oxidation reactor, second grade ozone/calcium peroxide oxidation reactor, charge device, ozone generator, one-level fenton oxidation reactor and second grade ozone/calcium peroxide oxidation reactor establish ties, one-level fenton oxidation reactor is equipped with water inlet, dosing port, delivery port, mud discharging port, tail gas discharge port, second grade ozone/calcium peroxide oxidation reactor is equipped with water inlet, medicine charge port, delivery port, mud discharging port, gas outlet, the delivery port of one-level fenton oxidation reactor and the water inlet intercommunication of second grade ozone/calcium peroxide oxidation reactor, ozone generator's gas outlet and second grade ozone/calcium peroxide oxidation reactor intercommunication, charge device is equipped with fenton reagent medicine storehouse, acid storehouse, calcium peroxide storehouse, Alkali and flocculating agent storehouse, fenton's reagent medicine storehouse is connected with the medicine mouth through the pipeline, calcium peroxide storehouse, alkali and flocculating agent export are connected with the medicine charge door through the pipeline respectively.
As a further improvement, the bottom of the first-level Fenton oxidation reactor and the second-level ozone/calcium peroxide oxidation reactor are funnel-shaped. By adopting the technical scheme, a precipitation reaction tank is not required to be additionally arranged, the bottom of the reactor has a precipitation effect, and the floor area is greatly reduced.
As a further improvement of the utility model, be equipped with first aeration component and exhaust emission port in the one-level Fenton oxidation reactor, be equipped with second aeration component in the second grade ozone/calcium peroxide oxidation reactor, ozone generator's gas outlet and second aeration component intercommunication, the gas outlet and the first aeration component intercommunication of second grade ozone/calcium peroxide oxidation reactor. The first aeration component and the second aeration component not only have the aeration function, but also can stir liquid through the gas disturbance action without additionally arranging a mechanical stirring device. Further, the first aeration component and the second aeration component are aeration heads or aeration discs.
As a further improvement of the utility model, the tail gas discharge port is connected with an ozone tail gas destruction device.
As a further improvement of the utility model, the treatment device for the chemical nickel plating wastewater comprises a gas storage device, the gas outlet of the second-level ozone/calcium peroxide oxidation reactor is connected with the gas storage device, and the outlet of the gas storage device is communicated with the first aeration component.
As a further improvement, the one-level fenton oxidation reactor and the second-level ozone/calcium peroxide oxidation reactor all comprise reaction columns, internal flow guide members are arranged in the reaction columns, the internal flow guide members comprise hollow cylindrical guide plates, and the first aeration member and the second aeration member are both positioned below the cylindrical guide plates.
As a further improvement of the utility model, the cylinder guide plate passes through the connecting piece and is connected with the reaction column, the cylinder guide plate is located the middle part of reaction column, the lower extreme of cylinder guide plate leans out.
As a further improvement of the utility model, the sludge discharge port of the first-level Fenton oxidation reactor and the second-level ozone/calcium peroxide oxidation reactor is positioned at the bottom of the reaction column.
As a further improvement of the utility model, the drug adding device comprises an acid-base drug adding pipeline and FeSO4Solution, H2O2A solution dosing pipeline, a calcium peroxide bin pipeline, an alkali and flocculant pipeline, an acid and alkali dosing pipeline and FeSO4Solution, H2O2The solution dosing pipelines are respectively connected with the dosing ports; the calcium peroxide bin pipeline, the alkali and flocculant pipeline are connected with the medicine feed inlet.
Further, the treatment process of the chemical nickel plating wastewater treatment device is as follows:
transferring the chemical nickel plating wastewater into a primary Fenton oxidation reactor, adjusting the pH to 3-4 by acid and alkali, and adding a Fenton reagent under the stirring condition to perform oxidation complex breaking reaction; in the step, under the action of strong oxidizing hydroxyl free radicals, the complex of the heavy metal is broken, organic ligands and other organic pollutants are oxidized, degraded and even mineralized, free nickel ions are released, and meanwhile, hypophosphite is gradually oxidized into orthophosphate which reacts with Fenton reaction product Fe3+The reaction forms an iron phosphate precipitate. Although the degradation process is accompanied by the generation of small molecular acid, the pH value of the wastewater is increased and still has weak acidity under the influence of the protonation degree and the ammonia nitrogen formation.
Transferring the effluent to a secondary ozone/calcium peroxide oxidation reactor, introducing ozone, adding calcium peroxide, and performing a synergistic oxidation reaction; in the step, because the pH value of the wastewater is weakly acidic, the secondary oxidation reaction can be directly carried out without adjusting the pH value of the wastewater. Through the synergistic oxidation of ozone/calcium peroxide, the mineralization degree and orthophosphate conversion rate of organic ligands and other organic pollutants and intermediate degradation products are obviously increased. In the reaction stage, calcium ions can further react with phosphate radical to generate calcium phosphate precipitate, and can remove pollutants in the wastewater in a synergistic manner in the form of calcium hydroxide.
Adding alkali and flocculant into the reaction product, further removing free heavy metal ions through coagulating sedimentation, and carrying out solid-liquid separation on the wastewater after sedimentation. The pH value of the waste water is increased due to the mineralization of the small molecular acid, and the dosage of alkali or flocculating agent required for the precipitation of free heavy metal ions is reduced due to the forms of precipitates such as calcium hydroxide, calcium phosphate and the like. The wastewater is subjected to rapid solid-liquid separation after a short settling period.
Furthermore, in the reaction, sequencing batch water feeding is adopted to carry out oxidation complex breaking reaction in the primary Fenton oxidation reactor, and residual ozone tail gas in the secondary ozone/calcium peroxide oxidation reactor is pumped into the primary Fenton oxidation reactor and is acted with a Fenton reagent together. By adopting the technical scheme, residual ozone tail gas in the secondary ozone/calcium peroxide oxidation reactor is pumped into the primary Fenton oxidation reactor, and the residual ozone tail gas and the Fenton reagent act together to further promote the oxidative degradation of pollutants in the wastewater and improve the overall utilization rate of the ozone of the coupling system.
The reaction time of each stage can be adjusted by controlling the dosing time, and wastewater can be treated up to the standard by sequentially feeding water to the primary Fenton oxidation reactor and the secondary ozone/calcium peroxide oxidation reactor in a batch mode.
Compared with the prior art, the beneficial effects of the utility model are that:
firstly, adopt the technical scheme of the utility model, through with first-order fenton oxidation reactor, second grade ozone/calcium peroxide oxidation reactor both jointly use, first-order fenton oxidation can deal with the high concentration pollution load of chemical nickel plating waste water, and the rapid oxidative degradation is most of organic pollutants, uses it as the prerequisite and couples second grade ozone/calcium peroxide collaborative oxidation, not only helps avoiding the pH of chemical nickel plating waste water after the fenton oxidation to adjust, can strengthen first-order fenton oxidation reaction efficiency moreover, further mineralize mineralization pollutant; meanwhile, the existence of calcium ions in the system is beneficial to further precipitating phosphate radicals and other pollutants, the dosage of alkali or flocculating agent required by the precipitation of free heavy metal ions after the second-level ozone/calcium peroxide oxidation is reduced, and the dosage cost of the medicament is saved. Further, the ozone tail gas in the second-stage ozone/calcium peroxide oxidation reactor is connected with the aeration component in the first-stage Fenton oxidation reactor, so that ozone can be introduced into the second-stage ozone/calcium peroxide oxidation reactor for reaction, the Fenton oxidation efficiency can be further enhanced, and the overall utilization rate of the ozone in the reaction system can be improved.
Second, the technical scheme of the utility model, set up the cylinder guide plate in the reaction column, be favorable to rivers to form vertical flow circulation to make rivers drive down at the reaction column inner loop under ozone and flow, help the extension reaction route, make ozone and waste water contact reaction more abundant, further improve ozone utilization ratio. Further, the outside slope edge in guide plate bottom makes the bubble that the aeration component produced assemble inside the guide plate more easily, improves the promotion effect to rivers upward movement, and in addition, when sediment separation, the slope edge can guide the sediment that generates to subside along the reactor wall to reduce the interference effect of bubble to the sediment.
Thirdly, in the technical scheme of the utility model, the bottom ends of the reaction columns of the first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor are funnel-shaped and can be precipitated, and the arranged aeration component has the functions of ozone aeration and gas stirring, so that a precipitation reaction tank and a mechanical stirring device are not needed to be additionally arranged, the investment and the operation cost are favorably reduced, and meanwhile, the aeration component can be backwashed by utilizing gas, and the risk of pore blockage of the aeration component is reduced; the two processes of ozone oxidation and precipitation separation are combined into one device for carrying out, so that the occupied area is saved, and the device is suitable for small-sized enterprises or low-water-volume wastewater treatment systems.
Drawings
FIG. 1 is a schematic structural diagram of a system for treating chemical nickel plating wastewater.
FIG. 2 is a schematic diagram of the internal structure of the first reaction column of the system for treating chemical nickel plating wastewater.
FIG. 3 is a cross-sectional view of a reaction column of the system for treating chemical nickel plating wastewater of the present invention.
The reference numerals include:
1-a first reaction column, 2-a second reaction column, 3-a guide plate, 4-a first aeration component, 5-a second aeration component and 6-a water inlet pipeline; 7-water outlet pipeline; 8-a sludge discharge pipe; 9-a dosing device, 10-an ozone tail gas absorption treatment system, 11-an ozone generator and 12-gas storage equipment; 13-air outlet pipeline, 14-air inlet pipeline and 15-guide plate fixing rod.
Detailed Description
Preferred embodiments of the present invention are described in further detail below.
As shown in fig. 1 to 3, a treatment device for chemical nickel plating wastewater comprises a primary fenton oxidation reactor, a secondary ozone/calcium peroxide oxidation reactor, a dosing device 9 and an ozone generator 11, wherein the primary fenton oxidation reactor and the secondary ozone/calcium peroxide oxidation reactor are connected in series. The first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor comprise reaction columns, namely a first reaction column 1 (corresponding to the first-stage Fenton oxidation reactor) and a second reaction column 2 (corresponding to the second-stage ozone/calcium peroxide oxidation reactor). First reaction column 1 and 2 series connection of second reaction column, first reaction column 1 is one section closed cylinder, and the bottom is hourglass hopper-shaped, can be used to fenton oxidation and precipitation separation. The shape and internal structure of the second reaction column 2 are the same as those of the first reaction column 1. The second reaction column 2 is also a closed cylinder, the bottom end of the second reaction column is funnel-shaped, and the second reaction column can be used for oxidation and precipitation separation of ozone/calcium peroxide. First reaction column 1 and second reaction column 2 all are equipped with the water inlet, add medicine mouth, delivery port, row's mud mouth, all be equipped with cylindrical guide plate 3 in first reaction column 1 and the second reaction column 2, cylindrical guide plate 3 is fixed through the inner wall connection of guide plate dead lever 15 with the reaction column. The cylindrical guide plate 3 is positioned in the middle of the reaction column, is a hollow pipeline and has no upper and lower bottoms, and the edge of the bottom of the cylindrical guide plate 3 is inclined outwards at a certain angle; the sludge discharge pipe 8 is positioned at the bottom of the reaction column and can be used for discharging precipitated sludge.
The first reaction column 1 and the second reaction column 2 are both connected with an external pipeline unit, and the external pipeline unit comprises a water outlet pipeline 7, a water inlet pipeline 6, a dosing pipeline, a sludge discharge pipe 8, an aeration pipeline and a tail gas absorption pipeline.
A water inlet pipeline 6 of the wastewater is connected with the first reaction column 1, a water outlet pipeline 7 of the first reaction column 1 is connected with a water inlet pipeline 6 of the second reaction column 2, and water which is treated by the first reaction column 1 can be added to the second reaction column 2 by utilizing equipment such as a water feed pump. And the wastewater treated by the second reaction column is discharged through a water outlet pipeline 7.
The first reaction column 1 and the second reaction column 2 are respectively provided with a first aeration component 4 and a second aeration component 5 below the cylindrical guide plate 3, the second aeration component 5 is connected with the ozone generator 11 through an aeration pipeline, the top of the second reaction column 2 is provided with a gas outlet, the gas outlet is connected with a gas storage device 12, and the gas storage device 12 is connected with the first aeration component 4 through an aeration pipeline. The top of first reaction column 1 is equipped with the exhaust outlet, the exhaust outlet passes through tail gas absorption pipeline and is connected to ozone tail gas absorption processing system 10. Further, the first aeration member 4 and the second aeration member 5 are aeration heads or aeration discs.
The bottoms of the first reaction column 1 and the second reaction column 2 are respectively connected with a sludge discharge pipe 8 and can be used for discharging precipitated sludge.
The medicine adding device 9 adds medicine through a medicine adding system pipeline; the medicine adding device 9 comprises storage bins for storing various medicines and is used for respectively storing acid-base liquid and FeSO4Solution, H2O2The chemical feeding system comprises a calcium peroxide solution feeding pipeline, an acid-base feeding pipeline and FeSO4Solution, H2O2The solution feeding pipeline and the alkali and flocculant feeding pipeline are connected with the acid and alkali feeding pipeline and the FeSO feeding pipeline, the feeding device 9 comprises a feeding device which can be a metering pump, a screw pump and the like, each drug is fed into the corresponding reaction column through the metering pump and the screw pump, the calcium peroxide feeding pipeline, the alkali and flocculant feeding pipeline are connected with the feeding port of the second reaction column 2, and the acid and alkali feeding pipeline and the FeSO feeding pipeline are connected with the FeSO feeding port of the second reaction column 24Solution, H2O2The solution dosing pipeline is respectively connected with the dosing port of the first reaction column 1.
The chemical nickel plating wastewater treatment device can be used for treating wastewater according to the following steps:
1) adding a certain amount of chemical nickel wastewater into the first reaction column 1, adding an acid or alkali solution into the wastewater through a dosing system, and adjusting the pH = 3-4 to obtain a mixture A;
2) in the mixture A, FeSO is respectively added according to a certain proportion through a medicine adding device 94Solution, H2O2Introducing the gas of the gas storage device 12 into the solution at the same time, reacting for 30 min, standing for 10 min, discharging the precipitated sludge to obtain a mixture B, and treating the gas discharged from the first reaction column 1 at the stage by a tail gas absorption system;
3) adding the mixture B into a second reaction column 2, adding a certain amount of calcium peroxide solution through a dosing device 9, opening an ozone generator 11, and introducing ozone for 27 min, wherein the specific concentration and flow rate are determined according to actual conditions to obtain a mixture C;
4) adding a certain amount of alkali solution and a flocculating agent into the mixture C, continuously introducing ozone for 3 min, fully mixing the alkali solution and the flocculating agent by utilizing the stirring action of gas to form a precipitate, standing the precipitate for 10 min, and discharging the precipitated sludge to obtain effluent;
5) in the stages of the step 3) and the step 4), the gas discharged from the second reaction column 2 is stored by the gas storage device 12 for reuse in the first reaction column 1;
6) in the stages of step 3) and step 4), a certain amount of chemical nickel wastewater is added into the first reaction column 1, and a new cycle of wastewater treatment process is carried out to realize wastewater treatment and discharge reaching standards.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (9)
1. The utility model provides a processing apparatus of chemical nickel plating waste water which characterized in that: it comprises a first-stage Fenton oxidation reactor, a second-stage ozone/calcium peroxide oxidation reactor, a dosing device and an ozone generator, wherein the first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor are connected in series, the first-stage Fenton oxidation reactor is provided with a water inlet, a water outlet, a dosing port, a sludge discharge port and a tail gas discharge port, the second-stage ozone/calcium peroxide oxidation reactor is provided with a water inlet, a water outlet, a medicine feeding port, a sludge discharge port and a gas outlet, the water outlet of the first-stage Fenton oxidation reactor is communicated with the water inlet of the second-stage ozone/calcium peroxide oxidation reactor, the gas outlet of the ozone generator is communicated with the second-stage ozone/calcium peroxide oxidation reactor, the dosing device is provided with a Fenton reagent medicine bin, an acid bin, a calcium peroxide bin, an alkali and a flocculant bin, and the Fenton reagent medicine bin is connected with the dosing port through a pipeline, the calcium peroxide bin, the alkali and the flocculant outlet are respectively connected with the medicine feed inlet through pipelines.
2. An apparatus for treating waste water from chemical nickel plating process according to claim 1, characterized in that: the bottom ends of the first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor are funnel-shaped.
3. An apparatus for treating waste water from chemical nickel plating process according to claim 2, characterized in that: the first-stage Fenton oxidation reactor is internally provided with a first aeration component and a tail gas discharge port, the second-stage ozone/calcium peroxide oxidation reactor is internally provided with a second aeration component, a gas outlet of the ozone generator is communicated with the second aeration component, and a gas outlet of the second-stage ozone/calcium peroxide oxidation reactor is communicated with the first aeration component.
4. An apparatus for treating waste water from chemical nickel plating process according to claim 3, characterized in that: the tail gas discharge port is connected with an ozone tail gas destruction device.
5. An apparatus for treating waste water from chemical nickel plating process according to claim 3, characterized in that: the device comprises a gas storage device, wherein a gas outlet of the secondary ozone/calcium peroxide oxidation reactor is connected with the gas storage device, and an outlet of the gas storage device is communicated with the first aeration member.
6. An apparatus for treating waste water from chemical nickel plating according to any of claims 3 to 5, characterized in that: the first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor respectively comprise reaction columns, internal flow guide members are arranged in the reaction columns, each internal flow guide member comprises a hollow cylindrical flow guide plate, and the first aeration member and the second aeration member are both located below the corresponding cylindrical flow guide plate.
7. An apparatus for treating waste water from chemical nickel plating process according to claim 6, characterized in that: the cylindrical guide plate is connected with the reaction column through a connecting piece, the cylindrical guide plate is positioned in the middle of the reaction column, and the lower end of the cylindrical guide plate inclines outwards.
8. An apparatus for treating waste water from chemical nickel plating process according to claim 6, characterized in that: and the sludge discharge ports of the first-stage Fenton oxidation reactor and the second-stage ozone/calcium peroxide oxidation reactor are positioned at the bottom of the reaction column.
9. An apparatus for treating waste water from chemical nickel plating process according to claim 6, characterized in that: the dosing device comprises an acid-base dosing pipeline and FeSO4Solution, H2O2A solution dosing pipeline, a calcium peroxide bin pipeline, an alkali and flocculant pipeline, an acid and alkali dosing pipeline and FeSO4Solution, H2O2The solution dosing pipelines are respectively connected with the dosing ports; the calcium peroxide bin pipeline, the alkali and flocculant pipeline are connected with the medicine feed inlet.
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| CN202120649667.XU CN214735010U (en) | 2021-03-30 | 2021-03-30 | Treatment device for chemical nickel plating wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113060868A (en) * | 2021-03-30 | 2021-07-02 | 哈尔滨工业大学（深圳） | Treatment method and treatment system for chemical nickel plating wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113060868A (en) * | 2021-03-30 | 2021-07-02 | 哈尔滨工业大学（深圳） | Treatment method and treatment system for chemical nickel plating wastewater |
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Effective date of registration: 20221008 Address after: A1206, Happiness City Commercial Building, Heping East Road, Tsinghua Community, Longhua Street, Longhua District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Wanmu Water Co.,Ltd. Address before: 518000 Taoyuan Street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) |
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