CN109502873B - Device and method for treating heavy metal ions in wastewater - Google Patents
Device and method for treating heavy metal ions in wastewater Download PDFInfo
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- CN109502873B CN109502873B CN201811368530.6A CN201811368530A CN109502873B CN 109502873 B CN109502873 B CN 109502873B CN 201811368530 A CN201811368530 A CN 201811368530A CN 109502873 B CN109502873 B CN 109502873B
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Water Supply & Treatment (AREA)
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- Treatment Of Water By Ion Exchange (AREA)
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- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention belongs to the technical field of wastewater treatment, and discloses a device and a method for treating heavy metal ions in wastewater. The device for treating the heavy metal ions in the wastewater forms closed-loop circulation by connecting the water pump with the water outlet of the water tank and sequentially arranging the water bath heating device, the horizontal and vertical permanent magnets, the valve and the flowmeter along the wastewater flow direction, and prepares conditions for magnetization and adsorption, and has the advantages of simple structure and convenient operation. And a filter is arranged on a filtering outlet at the bottom of the water tank, a filtering valve is arranged on a water outlet pipeline, and the ion exchange resin is filtered after adsorption is finished. The method firstly adopts a magnetization means to magnetize the wastewater containing the heavy metal ions, and adopts the circulation magnetization of the wastewater under a lower flow velocity to improve the number of hydrogen bonds in the system, so that the adsorption efficiency and the adsorption rate can be realized when the resin is promoted to be independently and dynamically adsorbed at a lower temperature.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a device and a method for treating heavy metal ions in wastewater.
Background
Non-ferrous metal smelting consumes a large amount of water, and a large amount of smelting sewage is generated. The waste water of non-ferrous metal smelteries often contains a plurality of metal ions and harmful substances simultaneously and has complex components. The pollution components are discharged into the environment to change the form or be transferred, diluted and accumulated, but can not be degraded, so that not only can a large amount of metal be lost, but also the water source and the water resource are seriously polluted, and the health of people is threatened. The waste water containing heavy metal ions is produced in a series of industries for processing and utilizing nonferrous metals, such as mines, smelting, processing electroplating and the like. The method for treating the wastewater containing the heavy metal ions mainly comprises the following steps: displacement method, ion exchange method, chemical neutralization method, adsorption method. The ion exchange technology is a liquid-phase component separation technology, has excellent separation selectivity and high concentration multiple, is convenient to operate, and has an outstanding effect. The removal of heavy metal ions or separation of substances from waste water can thus be achieved using ion exchange. The ion exchange resin is used for selectively separating heavy metal ions in the wastewater, so that the treatment of the heavy metal ions in the wastewater and the recovery of the heavy metal ions can be better realized, and the ion exchange resin has important significance for the application of heavy metal wastewater treatment.
Disclosure of Invention
The invention aims to solve the problems in the treatment of wastewater containing heavy metal ions in the prior art, and provides a device for treating heavy metal ions in wastewater, which has a good adsorption effect and low cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a device for handle heavy metal ion in waste water, including the basin, the delivery port of basin is connected with the water pump, the exit linkage of water pump has the circulation pipeline, water bath heating device, first permanent magnet, the second permanent magnet, circulation valve and flowmeter are equipped with in proper order along the waste water flow direction on the circulation pipeline, and the circulation pipeline is connected with the water inlet of basin, the bottom of basin still is equipped with filters the export, filter outlet department is equipped with filter equipment, it has the outlet pipe way to filter the export connection, it filters the valve to be equipped with on the outlet pipe way, the magnetic induction line direction of first permanent magnet is parallel with the liquid flow direction, the magnetic induction line direction of second permanent magnet is perpendicular with the liquid flow direction.
Another object of the present invention is to provide a method for treating heavy metal ions in wastewater, comprising the steps of:
(1) opening a circulating valve, pouring the waste water with copper smelting into a water tank and filling the water tank, then starting a water pump and a water bath heating device, controlling the temperature of the water bath heating device to be 25-35 ℃, controlling the magnetic field intensity of a horizontally oriented permanent magnet to be 3T-3.5T, controlling the magnetic field intensity of a second permanent magnet to be 0.5T-1.5T, controlling the pH range of the treatable waste water to be 5-8, and then regulating the water speed in a pipeline to be 0.2-0.5 m/s by using the circulating valve;
(2) after the debugging is finished, the wastewater begins to be circularly magnetized, and the magnetizing time is t1And t is1Is not less than V1V is where V1Is the volume of the water tank, S is the sectional area of the circulating pipeline, and v is the water velocity;
(3) after the magnetization is finished, the heavy metal ions in the wastewater are thoroughly magnetized, and then the second permanent magnet is removed, and the first permanent magnet is left;
(4) then adding ion exchange resin into the water tank to adsorb heavy metal ions in the wastewater, wherein the mass ratio of the weight of the added ion exchange resin to the heavy metal ions in the wastewater is 1: 1-3: 1; the adsorption temperature is 25-35 ℃, and the adsorption time is as follows: 20 min-30 min;
(5) and after adsorption, closing the water pump and the circulating valve, standing for 10-30 min, opening the filtering valve after standing, keeping the ion exchange resin in the water tank, and allowing the filtered water to flow out along a water outlet pipeline.
(6) After the filtration is finished, collecting the ion exchange resin, then adding clear water into the water tank, and starting a water pump and a circulating valve washing pipeline.
Furthermore, the first permanent magnet and the second permanent magnet are horizontally distributed and directly clamped on the pipe wall of the circulating pipeline.
Further, the ion exchange resin after the adsorption in the step (5) is completed can be recycled.
Further, the water bath heating device is a water bath heater.
Further, the filter device is a filter paper, and the filter paper is added at the inlet of the filter valve.
Compared with the prior art, the invention has the following beneficial effects:
the device for treating heavy metal ions in wastewater is provided with a water pump connected with the water outlet of the water tank, and a water bath heating device, a first permanent magnet, a second permanent magnet, a circulating valve and a flowmeter are sequentially arranged along the wastewater flow direction, so that closed-loop circulation is formed, conditions are prepared for magnetization and adsorption, the structure is simple, and the operation is convenient. And a filter is arranged on a filtering outlet at the bottom of the water tank, a filtering valve is arranged on a water outlet pipeline, and the ion exchange resin is filtered after adsorption is finished.
The reason why the magnetic field magnetizes the heavy metal wastewater first and the flow rate of the circulating water is set to be a small value in the treatment method of the invention is that the magnetization effect is more sufficient when the circulating water flows through the magnetic field at a low speed. Because the magnetism of heavy metal ions in the wastewater is different, a horizontal magnetic field parallel to the flowing direction of liquid in the direction of a magnetic induction line is acted by a paramagnetic concentration gradient force and a magnetic field gradient force, a magnetic field vertical to the flowing direction of liquid in the direction of the magnetic induction line is acted by a lorentn magnetic force, the two are combined to realize the separation of the ions, and the change of the quality can be generated in the wastewater treatment. In addition, the magnetic treatment has a memory effect, the magnetization effect can be kept for 4-8h approximately, therefore, the adsorption rate and the adsorption capacity can be improved by removing the magnetic field with the magnetic induction line direction perpendicular to the liquid flowing direction after magnetization, the recovery of the ion exchange resin is also facilitated, the selective adsorption of the ion exchange resin can be promoted by the horizontal magnetic field with the magnetic induction line direction parallel to the liquid flowing direction in the whole magnetization and adsorption process, and the filtering valve is always in a closed state in the process. The method firstly adopts a magnetization means to magnetize the wastewater containing the heavy metal ions, and adopts the circulation magnetization of the wastewater under a lower flow velocity to improve the number of hydrogen bonds in the system, so that the adsorption efficiency and the adsorption rate can be realized when the resin is promoted to be independently and dynamically adsorbed at a lower temperature.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention.
The reference numerals have the following meanings: 1. a water tank; 2. a water pump; 3. a water bath heating device; 4. a first permanent magnet; 5. a second permanent magnet; 6, a circulating valve; 7. a flow meter; 8. a filtration device; 9. and (4) filtering the valve.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, a device for treating heavy metal ions in wastewater, including basin 1, the delivery port of basin 1 is connected with water pump 2, the exit linkage of water pump 2 has the circulation pipeline, the pipe diameter homogeneous phase of whole circulation pipeline, water bath heating device 3 is equipped with in proper order along the waste water flow direction on the circulation pipeline, first permanent magnet 4, second permanent magnet 5, circulating valve 6 and flowmeter 7, and the circulation pipeline is connected with the water inlet of basin 1, the bottom of basin 1 still is equipped with the filtration export, filter outlet department is equipped with filter equipment 8, filter outlet connection has the outlet pipe way, the last filter valve 9 that is equipped with of outlet pipe way, filter equipment 8 is filter paper, and filter paper installs the import department at filter valve 8 additional. The water bath heating device 3 is a water bath heater. The first permanent magnet 4 and the second permanent magnet 5 are permanent magnets with adjustable magnetic fields, the adjustable range of the magnetic field intensity of the first permanent magnet 4 is 3T-3.5T, and the adjustable range of the magnetic field intensity of the second permanent magnet 5 is 0.5T-1.5T. The magnetic induction line direction of the first permanent magnet 4 is parallel to and the same as the liquid flowing direction, and the magnetic induction line direction of the second permanent magnet 5 is perpendicular to the liquid flowing direction.
Example 1
A method for treating heavy metal ions in wastewater comprises the following steps:
(1) and opening a circulating valve 6, filling the copper-containing wastewater into a water tank 1, then starting a water pump 2 and a water bath heating device 3, controlling the temperature of the water bath heating device 3 at 25 ℃, controlling the magnetic field intensity of a horizontally oriented permanent magnet 4 to be 3T, controlling the magnetic field intensity of a second permanent magnet 5 to be 0.5T, and directly clamping the first permanent magnet 4 and the second permanent magnet 5 on the pipe wall of a circulating pipeline in a horizontal distribution manner. The magnetic induction line direction of the first permanent magnet 4 is parallel to and the same as the liquid flowing direction, and the magnetic induction line direction of the second permanent magnet 5 is perpendicular to the liquid flowing direction. The pH of the wastewater was 5, after which the water in the line was adjusted to 0.2m/s by means of a recycle valve 6 in conjunction with a flow meter 7.
(2) After the equipment is debugged, the wastewater begins to circularly run and magnetize, V1Is 4m3The sectional area S of the water pipe is 0.02m2The water velocity V is 0.2m/s, wherein V1The volume of the water tank 1, S the sectional area of the circulating pipeline, v the water speed, the time t for magnetizing the wastewater1Is 1000 s.
(3) And after the magnetization is finished, the heavy metal ions in the wastewater are completely magnetized, the second permanent magnet 5 is removed, and the first permanent magnet 4 is left.
(4) Then 40g of D851 type ion exchange resin is added into the water tank 1 according to the mass ratio of the added weight of the ion exchange resin to the Cu ions in the wastewater being 1:1, the adsorption temperature is 25 ℃, and the adsorption time is as follows: 30min, the concentration of Cu ion solution which can be processed by 0.1g of resin is 150 mg/L.
(5) And after adsorption is finished, closing the water pump 2 and the circulating valve 6, standing for 10 min, opening the filtering valve 9 after standing, filtering the ion exchange resin and leaving the ion exchange resin in the water tank 1, allowing the filtered water to flow out along a water outlet pipeline, and recycling the ion exchange resin after adsorption is finished.
(6) After the filtration is finished, clean water is added into the water tank 1, and the water pump 2 and the circulating valve 6 are started to wash the pipeline.
Example 2
A method for treating heavy metal ions in wastewater comprises the following steps:
(1) and opening a circulating valve 6, filling the water tank 1 with the copper-containing wastewater, then starting a water pump 2 and a water bath heating device 3, controlling the temperature of the water bath heating device 3 at 30 ℃, controlling the magnetic field intensity of a horizontally oriented permanent magnet 4 to be 3.2T, controlling the magnetic field intensity of a second permanent magnet 5 to be 1T, and directly clamping the first permanent magnet 4 and the second permanent magnet 5 on the pipe wall of a circulating pipeline in a horizontal distribution manner. The magnetic induction line direction of the first permanent magnet 4 is parallel to and the same as the liquid flowing direction, and the magnetic induction line direction of the second permanent magnet 5 is perpendicular to the liquid flowing direction. The pH value of the waste water is 6, and then the water speed in the pipeline is adjusted to 0.25m/s by utilizing a circulating valve 6 and a flowmeter 7.
(2) After the debugging is finished, the wastewater starts to circularly run and be magnetized, V1Is 4m3The sectional area S of the water pipe is 0.02m2The water velocity V is 0.25m/s, where V1The volume of the water tank 1, S the sectional area of the circulating pipeline, v the water speed, the time t for wastewater treatment1Is 800 s.
(3) And after the magnetization is finished, the heavy metal ions in the wastewater are completely magnetized, the second permanent magnet 5 is removed, and the first permanent magnet 4 is left.
(4) Then, 120g of ion exchange resin D851 type was added to the water tank 1 in a mass ratio of the mass of the ion exchange resin to the mass of Cu ions in the wastewater of 2:1, at an adsorption temperature of 30 ℃ for an adsorption time of: 25min, the concentration of Cu ion solution which can be processed by 0.1g of resin is 205 mg/L.
(5) And after adsorption is finished, closing the water pump 2 and the circulating valve 6, standing for 20 min, opening the filtering valve 9 after standing, filtering the ion exchange resin and leaving the ion exchange resin in the water tank 1, allowing the filtered water to flow out along a water outlet pipeline, and recycling the ion exchange resin after adsorption is finished.
(6) After the filtration is finished, clean water is added into the water tank 1, and the water pump 2 and the circulating valve 6 are started to wash the pipeline.
Example 3
A method for treating heavy metal ions in wastewater comprises the following steps:
(1) and opening a circulating valve 6, pouring the copper smelting wastewater into the water tank 1, filling the water tank 1 with the copper smelting wastewater, then starting a water pump 2 and a water bath heating device 3, controlling the temperature of the water bath heating device 3 at 35 ℃, controlling the magnetic field intensity of a horizontally oriented first permanent magnet 4 to be 3.5T, controlling the magnetic field intensity of a second permanent magnet 5 to be 1.5T, and directly clamping the first permanent magnet 4 and the second permanent magnet 5 on the pipe wall of a circulating pipeline in a horizontal distribution manner. The magnetic induction line direction of the first permanent magnet 4 is parallel to and the same as the liquid flowing direction, and the magnetic induction line direction of the second permanent magnet 5 is perpendicular to the liquid flowing direction. The pH value of the waste water is 7, and then the water speed in the pipeline is adjusted to 0.5m/s by utilizing a circulating valve 6 and a flowmeter 7.
(2) After the debugging is finished, the wastewater starts to circularly run and be magnetized, V1Is 4m3The sectional area S of the water pipe is 0.02m2The water velocity v is 0.5m/s and the magnetization time t is1In which V is1The volume of the water tank 1, S the sectional area of the circulating pipeline, v the water speed, the time t for magnetizing the wastewater1Is 400 s.
(3) And after the magnetization is finished, the heavy metal ions in the wastewater are completely magnetized, the second permanent magnet 5 is removed, and the first permanent magnet 4 is left.
(4) Then adding D851 type ion exchange resin into the water tank 1 according to the mass ratio of the ion exchange resin to the Cu ions in the wastewater being 3:1, adding 120g of the ion exchange resin, wherein the adsorption temperature is 30 ℃, and the adsorption time is as follows: 25min, the concentration of Cu ion solution which can be processed by 0.1g of resin is 205 mg/L.
(5) And after adsorption is finished, closing the water pump 2 and the circulating valve 6, standing for 30min, opening the filtering valve 9 after standing, filtering the ion exchange resin and leaving the ion exchange resin in the water tank 1, allowing the filtered water to flow out along a water outlet pipeline, and recycling the ion exchange resin after adsorption is finished.
(6) After the filtration is finished, clean water is added into the water tank 1, and the water pump 2 and the circulating valve 6 are started to wash the pipeline.
Example 4
A method for treating heavy metal ions in wastewater comprises the following steps:
(1) and opening a circulating valve 6, pouring the waste water with copper smelting into a water tank 1, filling the water tank 1, then opening a water pump 2 and a water bath heating device 3, controlling the temperature of the water bath heating device 3 at 35 ℃, controlling the magnetic field intensity of a first permanent magnet 4 in horizontal orientation to be 0T, controlling the magnetic field intensity of a second permanent magnet 5 to be 0T, controlling the pH value of the waste water to be 7, and then adjusting the water speed in the pipeline to be 0.5m/s by utilizing the circulating valve 6 and a flowmeter 7.
(2) After the debugging is finished, adding D851 type ion exchange resin into the water tank 1 according to the mass ratio of the ion exchange resin to the Cu ions in the wastewater being 3:1, adding 120g of the ion exchange resin, and enabling the adsorption temperature to be 30 DEG CThe adsorption time is as follows: 25min, V1Is 4m3The sectional area S of the water pipe is 0.02m2The water velocity v is 0.5m/s and the running time is t1In which V is1Is the volume of the water tank 1, S is the cross-sectional area of the circulation pipeline, v is the water velocity, t is the water flow1Is 400s<The adsorption time is as follows: and (5) 25 min. Therefore, after 25min, the concentration of Cu ion solution that can be treated with 0.1g of the resin was measured to be 102 mg/L.
(5) And after adsorption is finished, closing the water pump 2 and the circulating valve 6, standing for 30min, opening the filtering valve 9 after standing, filtering the ion exchange resin and leaving the ion exchange resin in the water tank 1, allowing the filtered water to flow out along a water outlet pipeline, and recycling the ion exchange resin after adsorption is finished.
(6) After the filtration is finished, clean water is added into the water tank 1, and the water pump 2 and the circulating valve 6 are started to wash the pipeline.
Claims (6)
1. The utility model provides a handle device of heavy metal ion in waste water, characterized by: including basin (1), the delivery port of basin (1) is connected with water pump (2), the exit linkage of water pump (2) has the circulation pipeline, water bath heating device (3) are equipped with in proper order along the waste water flow direction on the circulation pipeline, first permanent magnet (4), second permanent magnet (5), circulating valve (6) and flowmeter (7), and the circulation pipeline is connected with the water inlet of basin (1), the bottom of basin (1) still is equipped with the filtration export, filter equipment (8) are equipped with to filtration export department, the filtration export is connected with the outlet conduit, outlet conduit is last to be equipped with and to filter valve (9), the magnetic induction line direction of first permanent magnet (4) is parallel with the liquid flow direction, the magnetic induction line direction of second permanent magnet (5) is perpendicular with the liquid flow direction.
2. A method for treating heavy metal ions in wastewater by using the device of claim 1, which comprises the following steps:
(1) opening a circulating valve (6), pouring smelting wastewater with copper into a water tank (1), filling the water tank (1), then opening a water pump (2) and a water bath heating device (3), controlling the temperature of the water bath heating device (3) to be 25-35 ℃, controlling the magnetic field intensity of a first permanent magnet (4) to be 3T-3.5T, controlling the magnetic field intensity of a second permanent magnet (5) to be 0.5T-1.5T, controlling the pH value of the wastewater to be 5-7, and then adjusting the water speed in a pipeline to be 0.2 m/s-0.5 m/s by using the circulating valve (6);
(2) after the debugging is finished, the wastewater begins to be circularly magnetized, and the magnetizing time is t1And t is1=V1V is where V1Is the volume of the water tank (1), S is the sectional area of the circulating pipeline, and v is the water speed;
(3) after the magnetization is finished, the heavy metal ions in the wastewater are completely magnetized, and then the second permanent magnet (5) is removed, and the first permanent magnet (4) is left;
(4) then, adding ion exchange resin into the water tank (1), wherein the mass ratio of the weight of the added ion exchange resin to the heavy metal ions in the wastewater is 1: 1-3:1, then beginning to adsorb heavy metal ions in the wastewater by using ion exchange resin, wherein the adsorption temperature is 25-35 ℃, and the adsorption time is as follows: 20 min-30 min;
(5) after adsorption is finished, closing the water pump (2) and the circulating valve (6), standing for 10-30 min, opening the filtering valve (9) after standing, filtering the ion exchange resin and remaining in the water tank (1), and allowing the filtered water to flow out along a water outlet pipeline;
(6) after the filtration is finished, clean water is added into the water tank (1), and the water pump (2) and the circulating valve (6) are started to wash the pipeline.
3. The method for treating heavy metal ions in wastewater as set forth in claim 2, wherein: in the step (1), the first permanent magnet (4) and the second permanent magnet (5) are horizontally distributed and directly clamped on the pipe wall of the circulating pipeline.
4. The method for treating heavy metal ions in wastewater as set forth in claim 2, wherein: the ion exchange resin after the adsorption in the step (5) can be recycled.
5. The apparatus of claim 1, wherein the apparatus comprises: the water bath heating device (3) is a water bath heater.
6. The apparatus of claim 1, wherein the apparatus comprises: the filter device (8) is made of filter paper, and the filter paper is additionally arranged at the inlet of the filter valve (9).
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| CN108046508B (en) * | 2017-11-27 | 2021-06-18 | 西北矿冶研究院 | Device and method for improving organic matter adsorption efficiency of carbon nano tube |
| CN108017166A (en) * | 2017-11-27 | 2018-05-11 | 西北矿冶研究院 | Scale removing device and method for circulating cooling water system |
| CN108658320A (en) * | 2018-05-02 | 2018-10-16 | 中国科学院生态环境研究中心 | A method of chemically recycling heavy metal nickel in nickel-plating waste water |
| CN110237657A (en) * | 2019-05-28 | 2019-09-17 | 西北矿冶研究院 | Separation device and method for carbon dioxide/methane mixed gas |
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