CN114314760A - Circulating water purification device and purification method - Google Patents
Circulating water purification device and purification method Download PDFInfo
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- CN114314760A CN114314760A CN202111676485.2A CN202111676485A CN114314760A CN 114314760 A CN114314760 A CN 114314760A CN 202111676485 A CN202111676485 A CN 202111676485A CN 114314760 A CN114314760 A CN 114314760A
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Abstract
The invention discloses a circulating water purification device and a circulating water purification method, which comprise a scale deposit, a box cover plate sliding mechanism and a box cover plate locking mechanism, wherein the box cover plate is provided with an anode plate, the box cover plate is connected with the anode plate through the box cover plate sliding mechanism, the inside of the scale deposit is provided with a cathode plate matched with the anode plate, the box cover plate locking mechanism comprises a clamping piece on the box cover plate, a locking threaded shaft and a rotating hand wheel, the locking threaded shaft is arranged on the box cover plate, the rotating hand wheel is in threaded connection with the locking threaded shaft, the scale deposit is provided with a water inlet, the lower part of the inner cavity of the scale deposit is provided with a water inlet distribution plate matched with the water inlet, and the top end of the scale deposit is fixedly provided with a water outlet. The invention is convenient for workers to clean the dirt accumulated in the electrochemical descaling box body and is beneficial to maintaining the parts, the anode plate and the cathode plate in the electrochemical descaling box body.
Description
Technical Field
The invention relates to the technical field of electrochemical descaling, in particular to a circulating water purification device and a circulating water purification method.
Background
The circulating water system is an important component in the production of chemical enterprises, the circulating water accounts for 90% of the total water consumption of the enterprises, the circulating water system is mainly used for heat exchange of equipment of the enterprises, and the production efficiency can be influenced if the cooling effect is poor.
The dirt inside the scale depositing device of the existing circulating water purifying device is inconvenient to clean, and the negative plate and the positive plate inside the box body are inconvenient to maintain.
Disclosure of Invention
The invention aims to solve the defects that dirt in a scale depositing device is inconvenient to clean and a negative plate and a positive plate in a box body are inconvenient to maintain in the prior art, and provides a circulating water purifying device and a purifying method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a circulating water purification device, includes scaling ware, box apron slide mechanism and box apron locking mechanism, the last anode plate that is equipped with of box apron, box apron pass through box apron slide mechanism and are connected with the anode plate, the inside negative plate that matches with the anode plate that is provided with of scaling ware, box apron locking mechanism includes fastener on the box apron and establishes locking threaded shaft, the rotatory hand wheel constitution on the scaling ware, rotatory hand wheel and locking threaded shaft threaded connection, be provided with the water inlet on the scaling ware, and scaling ware inner chamber lower part is provided with the distribution plate of intaking that matches with the water inlet, the fixed delivery port that is provided with in scaling ware top.
Preferably, box apron slide mechanism is including establishing pulley mounting panel, vertical track, the horizontal pulley at box apron top, the pulley mounting panel on the fixed vertical pulley that is provided with the dirt separator top be provided with horizontal track, horizontal pulley is installed on vertical track, vertical pulley and horizontal pulley movable mounting respectively on vertical track and horizontal track.
Preferably, the outer surface of the rotating handwheel is smoothly polished.
A method for purifying circulating water comprises the following steps:
s1: before the equipment runs, firstly, connecting the anode of a direct current constant current source with an anode terminal, and connecting the cathode of the direct current constant current source with a cathode terminal;
s2: the water inlet valve is opened to fill the equipment with water, so that the current value is adjusted to perform hydrogen evolution reaction on the surface of the cathode, the current value is stabilized, the device works in a constant current state, and the operating current density range is 18-50A/m 2;
s3: and then adjusting the water inlet and outlet flow of the equipment to achieve the required outlet water hardness value.
Preferably, the method further comprises the following steps:
s4: and after the cathode surface is deposited with the scale deposit, stopping the power supply of the direct current constant current source, closing the water inlet valve, and then opening the cover plate (5) of the box body to clean loose scales in the scale depositing device (2).
Preferably, the stable flow rate of the outlet water is 3-8m3/h。
Preferably, water is electrolytically reacted at the cathode to form OH under the action of electric current-OH produced-Can break the balance between alkalinity and hardness in the solution near the cathode to ensure that HCO in the solution3 -Conversion to CO3 2-. At the same time, Ca in water2+、Mg2+The scaling ions migrate to the cathode region under the left and right electrostatic attraction to respectively generate CaCO3、Mg(OH)2Precipitating out.
Preferably, under the action of the electric field, the chloride ions in the water are oxidized into chlorine gas, hypochlorous acid and hypochlorite radicals, the hypochlorous acid is a small neutral molecule which can diffuse to the surface of the negatively charged bacteria and penetrate into the bacteria through the cell walls of the bacteria, and when the hypochlorous acid reaches the inside of the bacteria, the enzyme system of the bacteria can be destroyed by oxidation to kill the bacteria.
Preferably, in the electrocatalytic reaction, ozone, hydroxyl radicals, hydrogen peroxide and oxygen radicals are generated on the surface of the electrode by electrolyzing water and oxygen dissolved in the water, and these strong oxides can oxidize various components in the microbial cells to cause irreversible changes in the microorganisms to die.
The invention has the beneficial effects that: the electrochemical descaling box is convenient for workers to clean dirt accumulated inside the electrochemical descaling box, and is beneficial to maintaining parts inside the electrochemical descaling box, the anode plate and the cathode plate.
Drawings
FIG. 1 is a schematic structural diagram of a circulating water purification apparatus according to the present invention;
in the figure: 1 rotating hand wheel, 2 scale depositing devices, 3 cathode plates, 4 anode plates, 5 box body cover plates, 6 water inlets, 7 water outlets and 8 water inlet distribution plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a circulating water purification device, including scaling ware 2, box body cover plate 5 slide mechanism and box body cover plate 5 locking mechanism, be equipped with anode plate 4 on box body cover plate 5, box body cover plate 5 passes through box body cover plate 5 slide mechanism and is connected with anode plate 4, the inside negative plate 3 that matches with anode plate 4 that is provided with of scaling ware 2, box body cover plate 5 locking mechanism includes fastener on box body cover plate 5 and the locking thread axle of establishing on scaling ware 2, rotatory hand wheel 1 is constituteed, the smooth processing of polishing of rotatory hand wheel 1 surface, rotatory hand wheel 1 and locking thread axle threaded connection, be provided with water inlet 6 on scaling ware 2, and scaling ware 2 inner chamber lower part is provided with the distributing plate 8 of intaking that matches with water inlet 6, the fixed delivery port 7 that is provided with in top of scaling ware 2, box body cover plate 5 slide mechanism includes the pulley mounting panel that establishes at box body cover plate 5 top, The device comprises a longitudinal rail and a transverse pulley, wherein the longitudinal pulley is fixedly arranged on a pulley mounting plate, the transverse rail is arranged at the top of the scale deposit 2, the transverse pulley is arranged on the longitudinal rail, and the longitudinal pulley and the transverse pulley are movably arranged on the longitudinal rail and the transverse rail respectively.
In the present invention, Ca in water is oxidized and reduced by electrochemical oxidation-reduction reaction2+、Mg2+The solid-state waste water is discharged in a solid form, the hardness of the water body is reduced, and meanwhile, oxidizing substances are generated, so that the breeding of bacteria and algae in a circulating water system is inhibited, and the functions of sterilizing and killing algae are achieved.
A method for purifying circulating water comprises the following steps:
s1: before the equipment runs, firstly, connecting the anode of a direct current constant current source with an anode terminal, and connecting the cathode of the direct current constant current source with a cathode terminal;
s2: the water inlet valve is opened to fill the equipment with water, so that the current value is adjusted to perform hydrogen evolution reaction on the surface of the cathode, the current value is stabilized, the device works in a constant current state, and the operating current density range is 18-50A/m 2;
s3: then adjusting the water inlet and outlet flow of the equipment to reach the required outlet water hardness value;
s4: and after the scale layer is deposited on the surface of the cathode, stopping the power supply of the direct current constant current source, closing the water inlet valve, and then opening the cover plate 5 of the box body to clean loose scale in the scale depositing device 2.
The stable flow rate of the outlet water is 3-8m3H is used as the reference value. Under the action of current, water is electrolyzed at the cathode to generate OH-OH produced-Can break the balance between alkalinity and hardness in the solution near the cathode to ensure that HCO in the solution3 -Conversion to CO3 2-. At the same time, Ca in water2+、Mg2+The scaling ions migrate to the cathode region under the left and right electrostatic attraction to respectively generate CaCO3、Mg(OH)2Precipitating out. Under the action of an electric field, chloride ions in water are oxidized into chlorine gas, hypochlorous acid and hypochlorite, the hypochlorous acid is small neutral molecules, can diffuse to the surfaces of negatively charged bacteria and penetrate into the bacteria through cell walls of the bacteria, and when the hypochlorous acid reaches the inside of the bacteria, the hypochlorous acid can play a role of oxidation to destroy enzyme systems of the bacteria so as to kill the bacteria. In the electrocatalytic reaction, ozone, hydroxyl radicals, hydrogen peroxide and oxygen radicals are generated on the surface of an electrode by electrolyzing water and oxygen dissolved in the water, and the strong oxides can oxidize various components in microbial cells to cause irreversible changes to the microbes so as to die.
1. The descaling principle is as follows:
under the action of current, water is electrolyzed at the cathode to generate OH-OH produced-Can break the balance between alkalinity and hardness in the solution near the cathode to ensure that HCO in the solution3 -Conversion to CO3 2-. At the same time, Ca in water2+、Mg2+The scaling ions migrate to the cathode region under the left and right electrostatic attraction to respectively generate CaCO3、Mg(OH)2Precipitating out.
In addition, CaCO is present under the action of an electric field3The crystalline form at the cathode surface can be changed from a hard calcite structure to a loose aragonite structure, which is easier to strip and remove.
2. Sterilization and algae removal:
under the action of the electric field, the chlorine ions in the water are oxidized into chlorine gas, hypochlorous acid, hypochlorite and the like. It is generally believed that electrolytic chlorination is effected primarily by hypochlorous acid. Hypochlorous acid is a small neutral molecule, only it diffuses to the negatively charged bacterial surface and penetrates into the interior of the bacteria through their cell walls. When hypochlorous acid reaches the interior of the bacteria, it acts as an oxidizing agent to destroy the enzyme system of the bacteria and the bacteria die. In addition, in the electrocatalytic reaction, some short-lived intermediates such as ozone, hydroxyl radicals, hydrogen peroxide, and oxygen radicals are generated on the surface of the electrode by electrolyzing water and oxygen dissolved in the water, and these strong oxides can oxidize various components in the microbial cells, thereby causing irreversible changes in the microorganisms and causing death.
3. The corrosion inhibition principle is as follows:
the corrosion of the circulating water is mainly caused by the following electrochemical reactions between the pipeline and the water interface:
Fe2++2OH-→Fe(OH)2 (1)
2Fe(OH)2+H2O+1/2O2→2Fe(OH)3 (2)
2Fe(OH)3→3H2O+Fe2O3 (3)
Fe2O3and H2Formation of red rust (Fe) by O reaction2O3﹒nH2O), which has a corrosive effect on steel. To prevent corrosion of steel parts, a "bluing" process is usually used, in which the steel parts are heated in air-water vapor or chemicals to a suitable temperature to form a blue or black protective layer on the surfaceA film containing magnetic iron oxide (Fe) as a main component3O4). In the electrochemical treatment process, the red rust reacts with electrons under the action of an electric field to generate magnetic iron oxide, and the component can separate the contact of the steel pipe wall and dissolved oxygen in water to play a role in corrosion prevention;
an electrochemical scaler with a case body size of 1500 multiplied by 750 multiplied by 650 mm. The cathode 3 is a carbon steel sheet with the thickness of 2mm, the sheet is fixed on the box body through a push-pull guide rail, and the anode 4 is a titanium sheet fixed by a titanium alloy bolt. The distance between the adjacent cathode and anode is 5 mm. The whole device is vertically placed, and the water inlet 6 is arranged at the bottom of the device. When water enters, water flows in from the water inlet 6 and flows out from the water outlet 7 at the upper part through the baffle 8. Specifically, before the equipment runs, the anode of the direct current constant current source is connected with the anode terminal, the cathode of the direct current constant current source is connected with the cathode terminal, the water inlet valve is opened to fill the equipment with water, the current value is further adjusted to enable the surface of the cathode to carry out hydrogen evolution reaction, the current value is stabilized, the device works under the constant current state, the operating current density range is 18-50A/m2, then the water inlet and outlet flow of the equipment is adjusted to achieve the required outlet water hardness value, and the stable flow is 3-5m3And h, stably operating the equipment, stopping supplying power by the direct current constant current source after the operation is carried out for 3 months and the scale layer is fully deposited on the surface of the cathode, closing the water inlet valve, and then opening the cover plate 5 of the box body to clean loose scale in the scale depositing device 2.
An electrochemical scale remover has a box size of 2000 × 750 × 650mm, and the other parameters and operation conditions are the same as those described above, so that the electrochemical scale remover can work under a constant current state, and the operating current density range is 18-50A/m2And then adjusting the water inlet and outlet flow of the equipment to achieve the required outlet water hardness value. The stable flow is 5-8m3And h, stably operating the equipment, stopping supplying power by the direct current constant current source after the electrode surface is fully deposited with the scale layer after the equipment operates for 3 months, closing the water inlet valve, and then opening the cabinet door of the box body to clean loose scale in the box body.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A circulating water purification device comprises a scale depositing device (2), a box cover plate (5) sliding mechanism and a box cover plate (5) locking mechanism, and is characterized in that an anode plate (4) is arranged on the box cover plate (5), the box cover plate (5) is connected with the anode plate (4) through the box cover plate (5) sliding mechanism, a cathode plate (3) matched with the anode plate (4) is arranged inside the scale depositing device (2), the box cover plate (5) locking mechanism comprises a clamping piece on the box cover plate (5), a locking threaded shaft and a rotating hand wheel (1), the locking threaded shaft is arranged on the scale depositing device (2), the rotating hand wheel (1) is in threaded connection with the locking threaded shaft, a water inlet (6) is arranged on the scale depositing device (2), and a water inlet distribution plate (8) matched with the water inlet (6) is arranged on the lower portion of an inner cavity of the scale depositing device (2), a water outlet (7) is fixedly arranged at the top end of the scale depositing device (2).
2. A circulating water purification apparatus as claimed in claim 1, wherein the sliding mechanism of the box cover plate (5) comprises a pulley mounting plate, a longitudinal rail and a transverse pulley, the pulley mounting plate is provided with the longitudinal pulley, the top of the scale deposit device (2) is provided with the transverse rail, the transverse pulley is mounted on the longitudinal rail, and the longitudinal pulley and the transverse pulley are movably mounted on the longitudinal rail and the transverse rail respectively.
3. A circulating water purification device as claimed in claim 1, characterized in that the outer surface of the rotating handwheel (1) is smoothly polished.
4. A method for purifying circulating water according to any one of claims 1-3, characterized by comprising the steps of:
s1: before the equipment runs, firstly, connecting the anode of a direct current constant current source with an anode terminal, and connecting the cathode of the direct current constant current source with a cathode terminal;
s2: the water inlet valve is opened to fill the equipment with water, so that the current value is adjusted to perform hydrogen evolution reaction on the surface of the cathode, the current value is stabilized, the device works in a constant current state, and the operating current density range is 18-50A/m 2;
s3: and then adjusting the water inlet and outlet flow of the equipment to achieve the required outlet water hardness value.
5. The method for purifying circulating water according to claim 4, further comprising the steps of:
s4: and after the cathode surface is deposited with the scale deposit, stopping the power supply of the direct current constant current source, closing the water inlet valve, and then opening the cover plate (5) of the box body to clean loose scales in the scale depositing device (2).
6. A method for cleaning circulating water according to claim 4, characterized in that the steady flow rate of the outlet water is 3-8m3/h。
7. The method of claim 4, wherein the water is electrolyzed at the cathode to generate OH under the action of electric current-OH produced-Can break the balance between alkalinity and hardness in the solution near the cathode to ensure that HCO in the solution3 -Conversion to CO3 2-. At the same time, Ca in water2+、Mg2+The scaling ions migrate to the cathode region under the left and right electrostatic attraction to respectively generate CaCO3、Mg(OH)2Precipitating out.
8. A method of purifying circulating water as claimed in claim 4, wherein under the action of the electric field, the chlorine ions in the water are oxidized into chlorine gas, hypochlorous acid and hypochlorite, the hypochlorous acid is small neutral molecules, which can diffuse to the surface of the negatively charged bacteria and penetrate into the bacteria through the cell walls of the bacteria, and when the hypochlorous acid reaches the inside of the bacteria, the enzyme system of the bacteria is destroyed by the oxidation to kill the bacteria.
9. A method of purifying circulating water as claimed in claim 8, wherein ozone, hydroxyl radicals, hydrogen peroxide and oxygen radicals are generated on the surface of the electrodes by electrolyzing the water and oxygen dissolved in the water in the electro-catalytic reaction, and these strong oxides can oxidize various components in the microbial cells to irreversibly change and kill the microbes.
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| CN202111676485.2A CN114314760A (en) | 2021-12-31 | 2021-12-31 | Circulating water purification device and purification method |
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| CN202111676485.2A CN114314760A (en) | 2021-12-31 | 2021-12-31 | Circulating water purification device and purification method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202237811U (en) * | 2011-09-22 | 2012-05-30 | 上海膜源环保科技有限公司 | External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor |
| US20150191369A1 (en) * | 2012-05-03 | 2015-07-09 | Tangent Company Llc | Hardness reduction apparatus and method |
| CN206858284U (en) * | 2017-06-19 | 2018-01-09 | 安徽安成工业设备有限公司 | A kind of box-type recirculated water electrochemical descaling device |
| CN213475536U (en) * | 2020-06-28 | 2021-06-18 | 江苏润聚环保科技有限公司 | Refrigerator formula electrochemistry is scale deposit water treatment facilities in advance |
| CN215249740U (en) * | 2021-07-14 | 2021-12-21 | 大连清源正创环保科技有限公司 | Electrochemistry circulating water treatment facilities |
-
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- 2021-12-31 CN CN202111676485.2A patent/CN114314760A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202237811U (en) * | 2011-09-22 | 2012-05-30 | 上海膜源环保科技有限公司 | External pressure type hollow fiber ultrafiltration membrane module of external membrane bioreactor |
| US20150191369A1 (en) * | 2012-05-03 | 2015-07-09 | Tangent Company Llc | Hardness reduction apparatus and method |
| CN206858284U (en) * | 2017-06-19 | 2018-01-09 | 安徽安成工业设备有限公司 | A kind of box-type recirculated water electrochemical descaling device |
| CN213475536U (en) * | 2020-06-28 | 2021-06-18 | 江苏润聚环保科技有限公司 | Refrigerator formula electrochemistry is scale deposit water treatment facilities in advance |
| CN215249740U (en) * | 2021-07-14 | 2021-12-21 | 大连清源正创环保科技有限公司 | Electrochemistry circulating water treatment facilities |
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Application publication date: 20220412 |
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