CN110723781A - Sewage treatment device and method for removing heavy metal ions - Google Patents
Sewage treatment device and method for removing heavy metal ions Download PDFInfo
- Publication number
- CN110723781A CN110723781A CN201911094076.4A CN201911094076A CN110723781A CN 110723781 A CN110723781 A CN 110723781A CN 201911094076 A CN201911094076 A CN 201911094076A CN 110723781 A CN110723781 A CN 110723781A
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- exchange
- exchange resin
- flushing
- salt
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 41
- 239000010865 sewage Substances 0.000 title claims abstract description 38
- 150000002500 ions Chemical class 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 66
- 239000011347 resin Substances 0.000 claims abstract description 62
- 229920005989 resin Polymers 0.000 claims abstract description 62
- 150000003839 salts Chemical class 0.000 claims abstract description 47
- 238000011010 flushing procedure Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 150000001450 anions Chemical class 0.000 claims abstract description 24
- 239000003456 ion exchange resin Substances 0.000 claims abstract description 20
- 229920003303 ion-exchange polymer Polymers 0.000 claims abstract description 20
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 150000001768 cations Chemical class 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 4
- 238000004065 wastewater treatment Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000012266 salt solution Substances 0.000 claims description 3
- 239000012267 brine Substances 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 2
- 159000000001 potassium salts Chemical class 0.000 claims 1
- 238000005342 ion exchange Methods 0.000 abstract description 8
- 230000002035 prolonged effect Effects 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- C02F1/46109—Electrodes
-
- 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
- C02F1/46109—Electrodes
- C02F2001/46119—Cleaning the electrodes
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a sewage treatment device for removing heavy metal ions, which comprises a plurality of exchange mechanisms, a flushing mechanism and a salt adding mechanism which are connected in series; the exchange mechanism comprises an exchange tank, at least one layer of exchange resin filter plate is arranged in the exchange tank, and each layer of exchange resin filter plate sequentially comprises an anion electrode plate, ion exchange resin and a cation electrode plate from top to bottom; the flushing mechanism comprises a flushing pipe capable of supplying high-pressure clear water, and the wall of the exchange tank is arranged corresponding to each exchange resin filter plate; the salt adding mechanism is arranged on the exchange tank and is used for containing salt and is communicated with the exchange tank through a salt conveying pipe. The invention improves the replacement ion exchange efficiency and prolongs the service life of the exchange resin; by combining the washing mechanism with the salt adding mechanism, the resin is recycled, the use cost is reduced, and the problem of high price of the existing resin is solved; the sewage treatment device is flexible to assemble, wide in adaptability, high in automation degree and worthy of popularization.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a sewage treatment device and a sewage treatment method for removing heavy metal ions.
Background
At present, methods for treating heavy metal wastewater can be roughly divided into three main categories: (1) a chemical method; (2) a physical treatment method; (3) a biological treatment method. The chemical method mainly comprises a chemical precipitation method and an electrolytic method, and is mainly suitable for treating the wastewater containing high-concentration heavy metal ions, and the chemical method is a main method for treating the wastewater containing heavy metals at home and abroad at present. The physical treatment method mainly comprises solvent extraction separation, an ion exchange method, a membrane separation technology and an adsorption method.
In practical application, the ion exchange method is favored because of simplicity and easy implementation and less secondary pollution. The ion exchange principle is to replace heavy metal ions in the sewage and make the heavy metal ions attach to ion exchange resin. The prior ion exchange resins are various, different exchange resins can be selected according to different sewage heavy metal ion components to carry out effective exchange in an exchange mechanism, the effect of replacing the heavy metal ions can be achieved, and the chemical reaction process in replacement depends on the types of the exchange resins and the types of the heavy metal ions in the sewage. The devices used by the existing exchange method are various, but all have the following disadvantages: after the exchange mechanism is used for a period of time, because a large amount of heavy metal salt is attached to the surface of the resin, micro gaps and the surface in the exchange resin are completely wrapped, and the purpose of removing heavy metal cannot be achieved if the exchange mechanism is continuously used, the exchange resin is removed and replaced in the conventional treatment method. However, the exchange resin on the market is expensive, and although the exchange resin can be replaced frequently to obtain good treatment effect, the economic cost is increased greatly, so that the economic pressure of treatment enterprises is increased.
Therefore, it is necessary to develop a more efficient and energy-saving ion exchange wastewater treatment technology by improving the drawbacks of the conventional ion exchange.
Disclosure of Invention
The invention aims to: in view of the above problems, the present invention provides a wastewater treatment apparatus and a wastewater treatment method for removing heavy metal ions, which can improve the efficiency of removing heavy metal ions by an exchange resin and prolong the service life of the exchange resin.
The invention comprises the following steps:
a sewage treatment device for removing heavy metal ions comprises a plurality of exchange mechanisms, a flushing mechanism and a salt adding mechanism which are connected in series; the exchange mechanism comprises an exchange tank, at least one layer of exchange resin filter plate is arranged in the exchange tank, and each layer of exchange resin filter plate sequentially comprises an anion electrode plate, ion exchange resin and a cation electrode plate from top to bottom; the flushing mechanism comprises a flushing pipe capable of supplying high-pressure clear water, and the wall of the exchange tank is arranged corresponding to each exchange resin filter plate; the salt adding mechanism is arranged on the exchange tank and is used for containing salt solution and communicated with the exchange tank through a salt conveying pipe.
The purpose of setting up anion electrode board and cation electrode board in every layer of vertical filter plate is that when sewage flows through any one deck resin filter board, all pass through anion electrode board earlier, because heavy metal ion all is the positive charge, under anion electrode board's effect, can give heavy metal ion electron compensation for partial heavy metal ion can be directly reduced and be the metal and attach on anion electrode board, has reduced exchange resin's replacement pressure, has prolonged the live time cycle. Meanwhile, the purpose of arranging a layer of cationic electrode plate at the lowest part is to further prevent positively charged metal ions from rapidly flowing away along with water flow in the flowing process of sewage, so that the retention time of the metal ions in an exchange resin layer is prolonged, and higher exchange efficiency is achieved.
Furthermore, the exchange resin filter plate is four layers, and the installation direction is perpendicular to the water flow direction and parallel to each other. Because the dynamic mobility of sewage, metal ion also can have most because can not be timely by the replacement or reduce into the metal and flow away, so set up multilayer resin filter and can effectually solve this problem.
Furthermore, the flushing pipe of the flushing mechanism comprises a flushing main pipe and a shunt pipe connected with the flushing main pipe; the shunt tubes are communicated with washing branch tubes and fixedly arranged on the side wall of the exchange tank corresponding to the exchange resin filter plates.
Furthermore, the salt adding mechanism comprises a funnel, a salt conveying pipe communicated with the funnel, and a salt conveying valve which is arranged on the salt conveying pipe and used for opening or closing the salt conveying pipe, wherein the other end of the salt conveying pipe is communicated with the exchange mechanism.
Furthermore, the exchange tank comprises a tank body with an opening at the upper part and a cover body which is closed and covered at the opening at the upper part of the tank body, the tank body and the cover body are detachably connected in a sealing way, and the salt adding mechanism is fixedly connected on the cover body.
Further, the drain pipe of each exchange mechanism is provided with a connecting flange for detachable connection. The arrangement of the connecting flange is favorable for series connection, and the exchange mechanisms with different numbers can be connected in series selectively according to different concentrations of heavy metal ions in sewage, so that the reaction time can be further increased, the flow can be effectively treated, and the treatment efficiency and the heavy metal ion removal rate can be improved.
Furthermore, program control valves are installed on a water inlet pipeline of the exchange mechanism and a flushing pipe of the flushing mechanism, the PLC component controls operation, a mode of controlling operation by the program control valves and the PLC is adopted, water inlet treatment capacity and operation time are set, and the flushing pipe is controlled to be flushed at certain intervals of operation time so as to realize autonomous operation of the device.
The invention also comprises a method for treating sewage by using the sewage treatment device, which comprises the following steps:
1) determining the concentration of heavy metal ions in the sewage and selecting an exchange mechanism, and determining the number of the exchange mechanisms and the type of ion exchange resin which need to be connected in series according to the concentration of the heavy metal ions; 2) controlling sewage to enter an exchange mechanism and sequentially pass through an anion electrode plate, ion exchange resin and a cation electrode plate; 3) stopping sewage from entering at intervals of set time, and introducing a high-pressure water source to wash the exchange resin filter plate; 4) and adding the replacement salts into the exchange mechanism through a salt adding mechanism according to a set proportion, so that the exchange resin is regenerated.
Further, the salt comprises one or two of sodium salt and potassium salt.
Further, the brine concentration is controlled to be 5% -15%, preferably 10%.
Due to the adoption of the scheme, the invention has the beneficial effects that: according to the invention, the traditional ion exchange method is improved, and the anion electrode plate and the cation electrode plate are respectively added in front of and behind the exchange resin, so that the exchange efficiency is improved, and the service life of the exchange resin is prolonged; by combining the exchange mechanism with the flushing regeneration mechanism, the various exchanged resins can be recycled; the use cost is reduced, and the problem of high price of the existing heavy metal ion replacement resin is solved; the sewage treatment device disclosed by the invention is flexible to assemble, can adapt to water samples with different heavy metal types and concentrations, is wide in applicable treatment capacity range, can be automatically implemented, and is worthy of popularization.
Drawings
FIG. 1 is a schematic perspective view of a sewage treatment apparatus according to the present invention;
FIG. 2 is a sectional view showing the internal construction of an exchange tank of the present invention;
in the figure, 1 is a water inlet pipe, 2 is a water inlet valve, 3 is a salt adding mechanism, 4 is an exchange mechanism, 5 is a flushing mechanism, 6 is a connecting flange, 7 is a water discharge valve, 8 is a water discharge pipe, 31 is a funnel, 32 is a salt conveying pipe, 33 is a salt conveying valve, 41 is a cover body, 42 is a tank body, 51 is a first flushing branch pipe, 52 is a second flushing branch pipe, 53 is a third flushing branch pipe, 54 is a fourth flushing branch pipe, 55 is a shunt pipe, 56 is a flushing main pipe, 511 is a first anion electrode plate, 512 is a first ion exchange resin, 513 is a first cation electrode plate, 521 is a second anion electrode plate, 522 is a second ion exchange resin, 523 is a second cation electrode plate, 531 is a third anion electrode plate, 532 is a third ion exchange resin, 533 is a third cation electrode plate, 541 is a fourth anion electrode plate, 542 is a fourth ion exchange resin, and 543 is a fourth cation electrode plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in figure 1, the water treatment device for detecting heavy metal ions in sewage and determining sewage comprises three exchange mechanisms connected in series, wherein each exchange mechanism 4 comprises an exchange tank for hermetically containing sewage, and a plurality of layers of mutually independent exchange resin filter plates are arranged in parallel in each exchange tank. Because the sewage treatment process is a dynamic process, the effective exchange efficiency in the exchange mechanism 4 can be further increased by arranging a plurality of layers of mutually independent exchange resin filter plates, and the clearance rate of heavy metal ions in unit flow is improved. The exchanging tank comprises a tank body 42 with an upper opening and a cover body 41 which is closed and covered on the upper opening of the tank body 42 in a sealing way, the tank body 42 and the cover body 41 are connected in a detachable and sealing way, and the salt adding mechanism 3 is fixedly connected on the cover body 41. The exchange resin filter plate is four layers, the installation direction is vertical to the water flow direction and parallel to each other, and the exchange resin filter plate consists of a first resin filter plate, a second resin filter plate, a third resin filter plate and a fourth resin filter plate.
The flushing mechanism 5 comprises a flushing main pipe 56 for supplying high-pressure clear water, a shunt pipe 55 connected with the flushing main pipe 56, and a first flushing branch pipe 51, a second flushing branch pipe 52, a third flushing branch pipe 53 and a fourth flushing branch pipe 54 which are communicated with the shunt pipe 55 and fixedly installed on the side wall of the exchange tank at positions corresponding to the resin filter plates. The salt adding mechanism 3 comprises a funnel 31, a salt conveying pipe 32 communicated with the funnel 31, and a salt conveying valve 33 arranged on the salt conveying pipe 32 and used for opening or closing the salt conveying pipe 32, wherein the other end of the salt conveying pipe 33 is communicated with the exchange mechanism 4.
The exchange mechanism at the water inlet end is provided with a water inlet pipe 1, a water inlet valve 2 is arranged on the water inlet pipe 1, a flushing main pipe 56 of the flushing mechanism 5 is provided with a flushing valve, and the water inlet valve 2 and the flushing valve can be program control valves and are controlled by a PLC control assembly. A drain valve 7 is arranged on the drain pipe 8; the drain pipe 8 of each exchange means 4 is provided with a connecting flange for a detachable connection.
As shown in fig. 2, the first resin filter sheet is composed of a first anion electrode plate 511, a first ion exchange resin 512, and a first cation electrode plate 513, which are installed in this order from top to bottom. The second resin filter plate consists of a second anion electrode plate 521, a second ion exchange resin 522 and a second cation electrode plate 523 which are sequentially arranged from top to bottom; the third resin filter plate consists of a third anion electrode plate 531, a third ion exchange resin 532 and a third cation electrode plate 533 which are sequentially arranged from top to bottom; the fourth resin filter plate is composed of a fourth anion electrode plate 541, a fourth ion exchange resin 542 and a fourth cation electrode plate 543 which are sequentially installed from top to bottom. The kind of the ion exchange resin can be determined according to the kind of the heavy metal ions in the sewage.
The sewage treatment device has the following operation modes: controlling the sewage to enter an exchange mechanism 4 for removing heavy metal ions; the sewage firstly passes through the anion electrode plate, and because heavy metal ions are positively charged, under the action of the anion electrode plate, the heavy metal ions can be compensated electronically, so that part of the heavy metal ions can be directly reduced into metal and attached to the anion electrode plate, the replacement pressure of the exchange resin is reduced, and the service life is prolonged; secondly, carrying out ion exchange reaction through ion exchange resin; and finally, the cation electrode plate can further prevent the positively charged metal ions from rapidly flowing away along with water flow, so that the retention time of the metal ions in the exchange resin layer is prolonged, and higher exchange efficiency is achieved. After the sewage treatment device operates for a period of time, the working state of the exchange resin can be judged according to empirical operation time data or the concentration of heavy metal in water can be detected, when the requirement for removing the heavy metal ions cannot be met, water can be stopped from entering by manual or automatic control system control, a flushing valve is opened, a high-pressure water source is introduced into each resin filter plate by a flushing main pipe 56 to realize flushing, and the heavy metal salt or dirt attached to the surfaces of the exchange resin and the ion electrode plate is cleaned. After the washing is finished, a proper amount of sodium chloride solution with the concentration of 10% is placed in the funnel, the salt conveying valve is opened, and salts are added into the exchange mechanism through the salt conveying pipe, so that the regeneration of the exchange resin is realized. During regeneration, either direct flushing or replacement by soaking the resin with salt solution can be selected or the combination of the two modes is selected.
Compared with the method without adding the anion electrode plate and the cation electrode plate, the method adopts the same exchange resin to treat the sewage of the same source, the removal rate of heavy metals in the treated sewage is improved by 60 percent on the original basis, and the service cycle of the ion exchange resin is prolonged by nearly one third compared with the method without adding the anion electrode plate due to the reduction of the replacement pressure of the anion electrode plate on the exchange resin. The resin filter plate is regenerated by the flushing mechanism 5 and the salt adding mechanism 3, so that the resin filter plate can be reused, the cost is effectively reduced, and the problem that the existing heavy metal ion replacement resin is high in price is solved.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. The utility model provides a be used for getting rid of heavy metal ion sewage treatment ware which characterized in that: comprises a plurality of exchanging mechanisms, flushing mechanisms and salt adding mechanisms which are connected in series; the exchange mechanism comprises an exchange tank, at least one layer of exchange resin filter plate is arranged in the exchange tank, and each layer of exchange resin filter plate sequentially comprises an anion electrode plate, ion exchange resin and a cation electrode plate from top to bottom; the flushing mechanism comprises a flushing pipe capable of supplying high-pressure clear water, and the wall of the exchange tank is arranged corresponding to each exchange resin filter plate; the salt adding mechanism is arranged on the exchange tank and is used for containing salt solution and communicated with the exchange tank through a salt conveying pipe.
2. A wastewater treatment plant according to claim 1, characterized in that: the exchange resin filter plate is four layers, and the installation direction is perpendicular to the water flow direction and parallel to each other.
3. A wastewater treatment plant according to claim 1, characterized in that: the flushing pipe of the flushing mechanism comprises a flushing main pipe and a shunt pipe connected with the flushing main pipe; the shunt tubes are communicated with washing branch tubes and fixedly arranged on the side wall of the exchange tank corresponding to the exchange resin filter plates.
4. A wastewater treatment plant according to claim 1, characterized in that: the salt adding mechanism comprises a funnel, a salt conveying pipe communicated with the funnel, and a salt conveying valve which is arranged on the salt conveying pipe and used for opening or closing the salt conveying pipe, wherein the other end of the salt conveying pipe is communicated with the exchange mechanism.
5. A wastewater treatment plant according to claim 1, characterized in that: the exchange tank comprises a tank body with an upper opening and a cover body which is closed and covered on the upper opening of the tank body in a sealing way, the tank body and the cover body are detachably connected in a sealing way, and the salt adding mechanism is fixedly connected to the cover body.
6. A wastewater treatment plant according to claim 1, characterized in that: the drain pipe of each exchange mechanism is provided with a connecting flange for detachable connection.
7. A sewage treatment apparatus as claimed in any one of claims 1 to 6, wherein: the water inlet pipeline of the exchange mechanism and the flushing pipe of the flushing mechanism are both provided with program control valves, and the operation is controlled by the PLC component.
8. A method of treating wastewater using the wastewater treatment apparatus according to any one of claims 1 to 7, comprising the steps of: 1) determining the concentration of heavy metal ions in the sewage and selecting an exchange mechanism, and determining the number of the exchange mechanisms and the type of ion exchange resin which need to be connected in series according to the concentration of the heavy metal ions; 2) controlling sewage to enter an exchange mechanism and sequentially pass through an anion electrode plate, ion exchange resin and a cation electrode plate; 3) stopping sewage from entering at intervals of set time, and introducing a high-pressure water source to wash the exchange resin filter plate; 4) and adding the replacement salts into the exchange mechanism through a salt adding mechanism according to a set proportion, so that the exchange resin is regenerated.
9. The method of wastewater treatment according to claim 8, wherein the salts comprise one or both of sodium salts and potassium salts.
10. The method of wastewater treatment according to claim 9, wherein the brine concentration is controlled to be 5% -15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094076.4A CN110723781B (en) | 2019-11-11 | Sewage treatment device and treatment method for removing heavy metal ions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911094076.4A CN110723781B (en) | 2019-11-11 | Sewage treatment device and treatment method for removing heavy metal ions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110723781A true CN110723781A (en) | 2020-01-24 |
| CN110723781B CN110723781B (en) | 2024-06-07 |
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| CN106830214A (en) * | 2017-03-28 | 2017-06-13 | 西安建筑科技大学 | A kind of device and method for processing acidic arsenic-containing solution |
| CN108033524A (en) * | 2017-11-23 | 2018-05-15 | 宁波职业技术学院 | A kind of double-deck mixed bed for heavy metal containing wastewater treatment is without film electrodeionization system and method |
| CN207713459U (en) * | 2017-12-15 | 2018-08-10 | 四川迪菲特环保设备有限公司 | A kind of duplex ion interchange unit that high-efficiency low-emission is useless |
| KR20190103670A (en) * | 2018-02-28 | 2019-09-05 | (주) 테크윈 | Apacitive deionization apparatus |
| CN211169975U (en) * | 2019-11-11 | 2020-08-04 | 四川建筑职业技术学院 | A sewage treatment ware for getting rid of heavy metal ion |
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