CN111747490A - Circulating water electrochemical treatment device and method - Google Patents
Circulating water electrochemical treatment device and method Download PDFInfo
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- CN111747490A CN111747490A CN201910244089.9A CN201910244089A CN111747490A CN 111747490 A CN111747490 A CN 111747490A CN 201910244089 A CN201910244089 A CN 201910244089A CN 111747490 A CN111747490 A CN 111747490A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 17
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 150000002500 ions Chemical class 0.000 abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 9
- 239000011575 calcium Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 9
- 229910052791 calcium Inorganic materials 0.000 abstract description 7
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 abstract description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 5
- 229910052801 chlorine Inorganic materials 0.000 abstract description 5
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011777 magnesium Substances 0.000 abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 abstract description 5
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 4
- 239000003899 bactericide agent Substances 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000004155 Chlorine dioxide Substances 0.000 abstract description 3
- 235000019398 chlorine dioxide Nutrition 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 150000001768 cations Chemical class 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 239000000126 substance Substances 0.000 description 5
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- 235000010216 calcium carbonate Nutrition 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 4
- 239000000347 magnesium hydroxide Substances 0.000 description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 4
- 235000012254 magnesium hydroxide Nutrition 0.000 description 4
- 229910001425 magnesium ion Inorganic materials 0.000 description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- PUCQIHBXUUHQBK-UHFFFAOYSA-N [Mg].[Ca].[Cl] Chemical compound [Mg].[Ca].[Cl] PUCQIHBXUUHQBK-UHFFFAOYSA-N 0.000 description 2
- 239000003619 algicide Substances 0.000 description 2
- 235000017168 chlorine Nutrition 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000002455 scale inhibitor Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 241000195628 Chlorophyta Species 0.000 description 1
- 241001415288 Coccidae Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003124 biologic agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 chloride ions Chemical class 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000012847 fine chemical Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 1
- 230000002132 lysosomal effect Effects 0.000 description 1
- 210000003712 lysosome Anatomy 0.000 description 1
- 230000001868 lysosomic effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/08—Corrosion inhibition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General 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)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a circulating water electrochemical treatment device and a method, wherein a control system judges the change of real-time water quality by acquiring current data in electrode plate group electrolysis in real time, outputs a control signal corresponding to the water quality to a power supply device aiming at the change of the water quality, outputs a pulse signal with corresponding frequency to the electrode plate group through the power supply device, assists in using a medicament, increases the ion concentration near an electrode plate, a cathode sheet adsorbs easy-scaling cations such as calcium, magnesium and the like, an anode sheet reduces chloride ions, part of the chlorine is released, and part of the chlorine is formed and hypochlorous acid and chlorine dioxide exist as a high-efficiency bactericide, so that the aim of no discharging sewage from circulating water is fulfilled, zero emission of the circulating water is thoroughly realized, and the operation cost; the installation of equipment need not change the pipeline, need not insert through the main circulating line and take the pressurized water, puts into or takes out the cold water basin through utmost point group hoist machine electrode plate group, so can not influence main circulating water system's pressure and lift, can not influence whole circulating water device's operation.
Description
Technical Field
The invention relates to the field of cooling circulating water treatment, in particular to a circulating water electrochemical treatment device and method.
Background
The circulating water is mainly applied to the industries such as petrochemical industry, coal chemical industry, steel, fine chemical industry and various industries needing heat exchange working conditions, and the like.
Because circulating water is continuously evaporated, scaling ions such as calcium and magnesium are enriched, the concentration of corrosive ions of chloride ion sulfate radicals to metals is increased, a certain proportion of concentrated circulating water must be continuously discharged, and fresh circulating water is supplemented to reduce the concentration of each ion and reduce scaling and corrosion probability. In order to prevent calcium and magnesium plasma from enriching and scaling, a scale inhibitor is required; in order to reduce the bacteria content of the circulating water, a bactericide is required; in order to prevent the circulating water from growing green algae, an algicide is required to be used; in order to reduce the chloride ions to a concentration that does not corrode the circulating water equipment and piping, it is necessary to continuously discharge the concentrated circulating water.
The discharged concentrated circulating water needs to be additionally collected and then concentrated, so that the subsequent cost of sewage treatment is increased, and meanwhile, the treatment cost of the circulating water is also increased due to the large use of scale inhibitors, bactericides and algicides in the circulating water.
Disclosure of Invention
In order to solve the problems, the invention provides a circulating water electrochemical treatment device and method, which can reduce the concentration of scaling ions such as calcium and magnesium and corrosive ions such as chloride ions, achieve the aim that the circulating water does not discharge sewage, thoroughly realize zero emission of the circulating water and reduce the cost of water treatment.
In order to achieve the purpose, the invention adopts the technical scheme that: a circulating water electrochemical treatment apparatus comprising:
the cold water tank is used for storing circulating water and buffering water consumption;
the electrode plate group is used for carrying out electrochemical treatment on circulating water, adsorbing calcium-magnesium-chlorine plasma in the circulating water, generating substances such as calcium carbonate, magnesium hydroxide and chlorine through electrochemical action, separating the substances from the water, and simultaneously collecting real-time current data of the motor plate group and sending the current data to the control system for treatment;
the power supply device is used for supplying power to the electrode plate group; the full-bridge circuit is used for receiving a control signal of a control system, converting the direct current into a pulse with variable frequency and acting on the electrode plate group;
the electrode group crane is used for driving the electrode plate group to be arranged in the cold water tank for electrochemical treatment and to leave the cold water tank;
the control system is used for setting control parameters of current and frequency of the electrode plate group, simultaneously collecting real-time current data of the electrode plate group, comparing the real-time current data with the current, voltage and frequency parameters of the set corresponding water quality, and outputting control signals of the corresponding water quality to the full-bridge circuit;
the input end of the rectifying circuit is externally connected with an alternating current power supply, the output end of the rectifying circuit is connected with the current input end of the full-bridge circuit, the current output end of the full-bridge circuit is connected with the electrode plate group, the electrode plate is connected with the input end of the control system, and the control signal output end of the control system is connected with the control signal input end of the full-bridge circuit.
Specifically, the electrode plate group comprises anode strips and cathode strips, wherein the number of the cathode strips is one more than that of the anode strips, and the anode strips and the cathode strips are arranged in parallel and alternately.
In order to achieve the purpose, the invention adopts another technical scheme that: the electrochemical treatment method of the circulating water comprises the following steps:
A. the electrode group crane drives the electrode plate group to move into the cold water tank;
B. the power supply device converts alternating current into direct current through the rectifying circuit, outputs variable-frequency pulses through the full-bridge circuit and acts on the electrode plate group to supply power to the motor plate group, the motor plate group adsorbs calcium-magnesium-chlorine plasma in circulating water in the cooling pool, and substances such as calcium carbonate, magnesium hydroxide and chlorine are generated through electrochemical action and separated from the water;
C. the control system collects real-time current data, compares the real-time current data with preset current, voltage and frequency parameters corresponding to water quality, and outputs a control signal corresponding to the water quality to the power supply device;
D. and the power supply device outputs pulses with variable frequency according to the control signals of the control system and acts on the electrode plate group to perform electrochemical treatment on the circulating water.
Specifically, a nano-scale forming agent and a composite chloride ion remover are added in the electrolysis process in the step B.
Specifically, in step D, the output frequency ranges from 0 to 50 HZ.
The invention has the beneficial effects that:
1. the control system judges the change of real-time water quality by acquiring current data in the electrolysis of the electrode plate group in real time, outputs a control signal corresponding to the water quality to the power supply device aiming at the change of the water quality, and outputs a pulse signal with corresponding frequency to the electrode plate group through the power supply device, so that the concentration of scaling ions such as calcium, magnesium and the like and corrosive ions such as chloride ions and the like is reduced, the aim that circulating water does not discharge sewage is fulfilled, zero emission of the circulating water is thoroughly realized, and the cost of water treatment is reduced;
2. the installation of equipment need not change the pipeline, need not insert through the main circulating line and take the pressurized water, enters into or leaves the cold water pond through utmost point group loop wheel machine drive electrode plate group, so can not influence main circulating water system's pressure and lift, also can not appear from the condition that does not directly get into the pond through the cooling tower after the return water pipeline inserts.
Drawings
Fig. 1 is a control schematic of the present invention.
Detailed Description
Referring to fig. 1, the present invention will be further described by way of specific embodiments.
The invention relates to a circulating water electrochemical treatment device, comprising:
the cold water tank is used for storing circulating water and buffering water consumption;
the electrode plate group is used for electrolyzing circulating water, collecting real-time current data of the motor plate group and sending the real-time current data to the control system for processing, wherein each electrode plate group consists of an anode sheet and a cathode sheet, the number of the cathode sheets is one more than that of the anode sheet, each electrode plate group in the embodiment comprises two anode sheets and three cathode sheets, the anode sheets and the cathode sheets are arranged in parallel and alternately, and the number of the electrode sheets is in a forward relation with the amount of processed water;
the power supply device is used for supplying power to the electrode plate group; the full-bridge circuit is used for receiving a control signal of a control system, converting the direct current into a pulse with variable frequency and acting on the electrode plate group; the power supply input is AC220V, the direct current is converted into direct current through the rectifying circuit, the direct current passes through the full-bridge circuit, and pulses with variable frequency are output and act on the electrode plate; the control system controls the amplitude, frequency and the like of direct current through a program algorithm by current signals generated by the anode and cathode sheets of the electrode plate group in the difference of different conductivities of circulating water, so as to form closed-loop control.
The electrode group crane is used for driving the electrode plate group to be arranged in the cold water tank for electrolysis and to leave the cold water tank;
the control system is used for setting control parameters of current and frequency of the electrode plate group, simultaneously collecting real-time current data of the electrode plate group, comparing the real-time current data with the current, voltage and frequency parameters of the set corresponding water quality, and outputting control signals of the corresponding water quality to the full-bridge circuit; water quality data are obtained through the anode and cathode plates of the electrode plate group, water quality change is obtained through different water quality currents, the current, voltage and current density are automatically adjusted according to the water quality change, the control system writes parameters such as current, voltage and frequency corresponding to different water qualities into a program in advance, the parameters such as current, voltage and frequency can be automatically matched according to instructions of the program under different water quality conditions, and the intelligent control system is suitable for intelligent control of water quality change.
The input end of the rectifying circuit is externally connected with an alternating current power supply, the output end of the rectifying circuit is connected with the current input end of the full-bridge circuit, the current output end of the full-bridge circuit is connected with the electrode plate group, the electrode plate is connected with the input end of the control system, and the control signal output end of the control system is connected with the control signal input end of the full-bridge circuit.
The treatment method comprises the following steps:
s1, moving an electrode plate group into a cold water tank under the drive of a pole group crane;
s2, converting alternating current into direct current by a power supply device through a rectifying circuit, outputting variable-frequency pulses through a full-bridge circuit, acting on a plate electrode group to supply power to a motor plate group, and electrolyzing circulating water in a cooling tank by the motor plate group; in the electrolytic process, circulating water can concentrate the ion concentration in water due to continuous evaporation, the anode can generate chlorine gas, and efficient bactericides such as hypochlorous acid, chlorine dioxide and the like are also arranged, the cathode can adsorb calcium and magnesium ions to promote the formation of loose scales such as calcium carbonate and magnesium hydroxide, and at the moment, the nano scale forming agent is added in an auxiliary manner to promote the accumulation of scale forming ions such as calcium and magnesium ions near the cathode of the electrode and balance the concentration of the scale forming ions in water, so that the scale forming ions are not formed in other heat exchange equipment; the anode electrode is assisted to capture chloride ions by the composite chloride ion remover, so that the concentration of the chloride ions in water is reduced to be below the level required by an owner, and the nano scale remover and the composite chloride ion remover can be purchased from the market;
s3, the control system collects real-time current data, compares the real-time current data with preset current, voltage and frequency parameters corresponding to water quality, and outputs a control signal corresponding to the water quality to the power supply device;
s4, the power supply device outputs pulses with variable frequency according to control signals of the control system and acts on the electrode plate group to carry out electrolytic treatment on circulating water, wherein the output frequency range is between 0 and 50HZ, and the following effects are achieved through the mixed frequency: 1) water molecule groups are well broken up, and calcium and carbonate ions can be well dissolved and surrounded by the fully broken up water molecule groups, so that a more effective scale inhibition effect is achieved; 2) the passivation period of the electrochemical anode can be prolonged through rapid frequency conversion, so that the service life of the anode is prolonged; 3) the vibration wave is used for interfering the crystallization and scaling of calcium and carbonate, and calcium magnesium ions, carbonate hydroxide and the like enriched by the nano medicament are scaled on the polar plate under the action of an electric field of the electrode; 4) the high frequency shock wave destroys the metabolism function of bacteria and microorganisms, thereby realizing more effective sterilization function.
The processing principle of the invention is as follows:
(1) the principle of hardness removal:
the cathode and water interface electrochemically reacts as follows:
2H2O+2e→2OH-+H2
OH-+HCO3-→H2O+CO32-
Mg2++2OH-→Mg(OH)2
Ca2++CO32-→CaCO3
the electron binding force of the residual scale molecules is damaged, the crystal structure of the residual scale molecules is changed, hard scales are changed into loose and soft scales, and the scale deposits are gradually peeled off.
(2) The corrosion prevention principle is as follows:
the following electrochemical reactions take place at the pipe and water interface:
Fe→Fe2++2e-
Fe2++2OH-→Fe(OH)2
2Fe(OH)2+H2O+1/2O2→2Fe(OH)3
2Fe (OH)3 → 3H2O + Fe2O3 (Red Rust, corrosive to steel)
Under the action of an electric field, the red rust and electrons react as follows:
3Fe2O3·nH2O+2e→2Fe3O4+1/2O2+3nH2O
generates a compact magnetic iron oxide (Fe3O4) film which can separate the steel pipe wall from water and has the function of corrosion prevention
(3) The sterilization and algae removal principle is as follows:
the anode and water interface electrochemically reacts as follows:
4OH--4e→2H2O+2[O]
H2O→·OH+H++e
O2+2H++2e→H2O2
O2-+H+→HO2·
O2+2e→O22-
2Cl-→Cl2+2e
Cl2+H2O→HClO+HCl
HClO→H++ClO-
2NACl2+CL2→2ClO2+2NACl
NAClO2+HCL→4ClO2+5NACl+2H2O
the strong oxidizing substances oxidize unsaturated fatty acids in cell membranes, so that the permeability of lysosome membranes is enhanced, lysosomal enzymes are released, cells are cracked and die, and the sustained sterilization capability is realized;
microorganisms generally have negative charges in water, and thus migrate and aggregate to the anode to cause direct death of biological discharge.
(4) The principle of reducing chloride ions is as follows:
the chloride ions are anions with the highest content in the circulating water and extremely strong corrosion force on the pipeline, and the concentration of salts such as chloride and the like can be increased in the process of continuous evaporation and concentration of the circulating water. When the chloride ion concentration is increased, the corrosion of carbon steel and stainless steel heat exchangers and other corresponding parts is accelerated. The chloride ion reduces the protective performance of the protective film on the metal, and accelerates corrosion.
The process adopts a polymer nano technology, synthesizes biological agents through the polymer nano technology under special conditions, quickly wraps chloride ions through adsorption after water is dissolved, enriches the chloride ions near the electrode plate, can release partial chlorine through the electrode plate, simultaneously generates hypochlorous acid and chlorine dioxide, and has the removal efficiency of over 90 percent. The special research and development is used for matching with a circulating water zero discharge system.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.
Claims (5)
1. A circulating water electrochemical treatment device is characterized in that: comprises that
The cold water tank is used for storing circulating water and buffering water consumption;
the electrode plate group is used for carrying out electrochemical treatment on circulating water, and simultaneously collecting real-time current data of the motor plate group and sending the current data to the control system for treatment;
the power supply device is used for supplying power to the electrode plate group; the full-bridge circuit is used for receiving a control signal of a control system, converting the direct current into a pulse with variable frequency and acting on the electrode plate group;
the electrode group crane is used for driving the electrode plate group to be arranged in the cold water tank for electrochemical treatment and to leave the cold water tank;
the control system is used for setting control parameters of current and frequency of the electrode plate group, simultaneously collecting real-time current data of the electrode plate group, comparing the real-time current data with the current, voltage and frequency parameters of the set corresponding water quality, and outputting control signals of the corresponding water quality to the full-bridge circuit;
the input end of the rectifying circuit is externally connected with an alternating current power supply, the output end of the rectifying circuit is connected with the current input end of the full-bridge circuit, the current output end of the full-bridge circuit is connected with the electrode plate group, the electrode plate is connected with the input end of the control system, and the control signal output end of the control system is connected with the control signal input end of the full-bridge circuit.
2. The circulating water electrochemical treatment device according to claim 1, characterized in that: the electrode plate group comprises anode strips and cathode strips, wherein the number of the cathode strips is one more than that of the anode strips, and the anode strips and the cathode strips are arranged in parallel and alternately.
3. A processing method using the apparatus of claim 1, comprising the steps of:
A. the electrode group crane drives the electrode plate group to move into the cold water tank;
B. the power supply device converts alternating current into direct current through the rectifying circuit, outputs pulses with variable frequency through the full-bridge circuit and acts on the electrode plate group to supply power to the motor plate group, and the motor plate group electrochemically processes circulating water in the cooling pool;
C. the control system collects real-time current data, compares the real-time current data with preset current, voltage and frequency parameters corresponding to water quality, and outputs a control signal corresponding to the water quality to the power supply device;
D. and the power supply device outputs pulses with variable frequency according to the control signals of the control system and acts on the electrode plate group to perform electrochemical treatment on the circulating water.
4. The method of claim 3, wherein: and B, adding a nano scale forming agent and a composite chloride ion remover in the electrolysis process of the step B.
5. The method of claim 3, wherein: in step D, the output frequency range is between 0 and 50 HZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244089.9A CN111747490A (en) | 2019-03-28 | 2019-03-28 | Circulating water electrochemical treatment device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910244089.9A CN111747490A (en) | 2019-03-28 | 2019-03-28 | Circulating water electrochemical treatment device and method |
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| CN111747490A true CN111747490A (en) | 2020-10-09 |
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| CN201910244089.9A Pending CN111747490A (en) | 2019-03-28 | 2019-03-28 | Circulating water electrochemical treatment device and method |
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| CN114538579A (en) * | 2022-02-24 | 2022-05-27 | 东北电力大学 | Alternating magnetic field scale inhibition method and device based on induced current signal feedback |
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